# According to Newtons law of inertia_

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Clicker Review: Newton’s Laws
Newton's law of inertia does not describe the
behavior of objects
A. in inertial frames of reference.
B. moving with constant velocity relative
20%    20%           20%    20%           20%
to a given frame of reference.
C. at rest relative to a given inertial frame
of reference.
D. moving in accelerated frames of
reference.
E. moving in a straight line at constant
speed relative to a given inertial
reference frame.

A.         B.        C.         D.         E.
1    2    3    4    5    6    7    8    9    10   11   12   13    14   15        16   17    18        19   20
21   22   23   24   25   26   27   28   29   30
Newton's law of inertia does not describe the
behavior of objects
A. in inertial frames of reference.
B. moving with constant velocity relative to a given frame
of reference.
C. at rest relative to a given inertial frame of reference.
D. moving in accelerated frames of reference.
E. moving in a straight line at constant speed relative to a
given inertial reference frame.
When Newton's first law of motion is mentioned,
you should immediately think of

20%        A. F = ma
20%        B. action-and-reaction forces.
20%        C. inertia.
20%        D. gravitational forces.
20%        E. centripetal acceleration.

1    2    3     4    5    6    7    8    9    10   11   12   13   14   15   16   17   18   19   20
21   22   23    24   25   26   27   28   29   30
When Newton's first law of motion is mentioned,
you should immediately think of

A. F = ma
B. action-and-reaction forces.
C. inertia.
D. gravitational forces.
E. centripetal acceleration.
A body moves with constant speed in a straight
line. Which of the following statements must be
true?
20%       20%   20%        20%    20%
A. No force acts on the body.
B. A single constant force acts on the
body in the direction of motion.
C. A single constant force acts on the
body in the direction opposite to the
motion.
D. A net force of zero acts on the body.
E. A constant net force acts on the body
in the direction of motion.                                       A.        B.     C.         D.         E.

1    2    3    4    5    6    7    8    9    10   11   12   13   14    15    16   17    18     19   20
21   22   23   24   25   26   27   28   29   30
A body moves with constant speed in a straight
line. Which of the following statements must be
true?

A. No force acts on the body.
B. A single constant force acts on the
body in the direction of motion.
C. A single constant force acts on the
body in the direction opposite to the
motion.
D. A net force of zero acts on the body.
E. A constant net force acts on the body
in the direction of motion.
A force accelerates a body of mass M. The same
force applied to a second body produces three
times the acceleration. What is the mass of the
second body?

A. M
20%                       20%
B. 3M
C. M/3                                        20%                                  20%
20%
D. 9M
E. M/9

A.   B.   C.   D.   E.

1    2    3    4    5    6    7    8    9    10   11   12   13   14    15   16   17    18   19   20
21   22   23   24   25   26   27   28   29   30
A force accelerates a body of mass M. The same
force applied to a second body produces three
times the acceleration. What is the mass of the
second body?

A. M
B. 3M
C. M/3
D. 9M
E. M/9
A person of weight w is in an upward-moving
elevator when the cable suddenly breaks. What is
the person's apparent weight immediately after the
elevator starts to fall?

A. w                                                     20%               20%
B. greater than w
C. less than w, but not
20%                          20%
zero
D. 9.81w                                                             20%

E. zero
A.    B.    C.   D.   E.
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21   22    23   24   25   26   27   28   29   30
A person of weight w is in an upward-moving
elevator when the cable suddenly breaks. What is
the person's apparent weight immediately after the
elevator starts to fall?

A. w
B. greater than w
C. less than w, but not zero
D. 9.81w
E. zero
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The acceleration due to gravity on the Moon is only about
1/6 of that on Earth. An astronaut whose weight on Earth
is 600 N travels to the lunar surface. His mass as
measured on the Moon is approximately

20%            A. 600 kg
20%            B. 100 kg
20%            C. 60 kg
20%            D. 10.0 kg
20%            E. 360 kg

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21   22   23   24   25   26   27   28   29   30
The acceleration due to gravity on the Moon is
only about 1/6 of that on Earth. An astronaut
whose weight on Earth is 600 N travels to the
lunar surface. His mass as measured on the
Moon is approximately

A. 600 kg
B. 100 kg
C. 60 kg
D. 10.0 kg
E. 360 kg
If a force F is required to extend a spring by 20 cm,
what force is required to extend it by 30 cm?
(Assume small displacements, so that Hooke’s
Law applies.)
A. F                                                                             20%

B. (2/3)F                                                                        20%

C. (3/2)F                                                                        20%

D. 600F                                                                          20%

E. (3/5)F                                                                        20%

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21   22    23   24   25   26   27   28   29   30
If a force F is required to extend a spring by 20 cm,
what force is required to extend it by 30 cm?
(Assume small displacements, so that Hooke’s
Law applies.)

A. F
B. (2/3)F
C. (3/2)F
D. 600F
E. (3/5)F
Which of the free-body diagrams represents the
block sliding down a frictionless inclined plane?
(Neglect air resistance.)
20%        20%        20%    20%        20%

A.   A
B.   B
C.   C
D.   D
E.   E

1    2    3    4    5    6    7    8    9    10   11   A.
12   13   B.
14   15   C.
16   17   D.
18   19   E.
20
21   22   23   24   25   26   27   28   29   30
Which of the free-body
diagrams represents the block
sliding down a frictionless
inclined plane? (Neglect air
resistance.)
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A box sits on an inclined plane without sliding. As
the angle of inclination increases, the normal force
A. increases.                                          20%        20%       20%            20%        20%

B. decreases.
C. does not change.
D. is directed upward.
E. is directed in the
direction of the
gravitational force.

A.         B.             C.         D.         E.

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A box sits on an inclined plane without sliding. As
the angle of inclination increases, the normal force

A. increases.
B. decreases.
C. does not change.
D. is directed upward.
E. is directed in the direction of the
gravitational force.
Is the net force an actual force?
1. Yes
50%     50%
2. No

1     2
Is the net force an actual force?

A. Yes
B. No
As you stand facing a friend, place your palms
against your friend’s palms and push. Can your
friend exert a force on you if you do not exert a
force back? Try it!

1. Yes
2. No                                                  50%                                        50%

1        2

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21   22   23   24   25   26   27   28   29   30
As you stand facing a friend, place your palms
against your friend’s palms and push. Can your
friend exert a force on you if you do not exert a
force back? Try it!

A. Yes
B. No
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Friction
Four identical blocks are moving on a surface for which the
coefficient of kinetic friction between each block and the
surface is µk. The velocity of each block is indicated by the
vector on the block. For which block is the force of friction
20% 20%
between the surface and the block greatest?20% 20% 20%

A.   1
B.   2
C.   3
D.   4
E.   The force of friction is the
1    same for all blocks.8 9 10
2  3  4  5   6   7                           11    12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.         B.         C.         D.         E.
Four identical blocks are moving on a surface for which the
coefficient of kinetic friction between each block and the
surface is µk. The velocity of each block is indicated by the
vector on the block. For which block is the force of friction
between the surface and the block greatest?

A.   1
B.   2
C.   3
D.   4
E.   The force of friction is the same for all blocks.
A block of mass m is at rest on an inclined plane
that makes an angle of 30º with the horizontal, as
shown in the figure. Which of the following
statements about the force of static friction is true?

A.    fs > mg
B.    fs > mg cos 30º
C.    fs = mg cos 30º
D.    fs = mg sin 30º
E.    None of the statements
is true.

20%                        20%

1    2    320%
4      5    6     7   8   9     20% 12
10 11     13   14   15   16   17   18   19   20
21   22   23   24   25   26    27 28   29   30
20%
A block of mass m is at rest on an inclined plane
that makes an angle of 30º with the horizontal, as
shown in the figure. Which of the following
statements about the force of static friction is true?

A.   fs > mg
B.   fs > mg cos 30º
C.   fs = mg cos 30º
D.   fs = mg sin 30º
E.   None of the statements is true.
A block of wood is pulled by a horizontal string
across a rough surface at a constant velocity with
a force of 20 N. The coefficient of kinetic friction
The force of 20% 20%
between the surfaces is 0.3.20% 20% 20% friction is

A. impossible to determine
without knowing the
mass of the block.
B. impossible to determine
without knowing the
speed of the block.
C. 0.3 N.
D. 6 N.
E. 20 N.
1    2    3    4    5    6    7    8    9    10   11    12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.         B.         C.         D.         E.
A block of wood is pulled by a horizontal string
across a rough surface at a constant velocity with
a force of 20 N. The coefficient of kinetic friction
between the surfaces is 0.3. The force of friction is

A.   impossible to determine without knowing the
mass of the block.
B.   impossible to determine without knowing the
speed of the block.
C.   0.3 N.
D.   6 N.
E.   20 N.
The SI units for the coefficient of friction are
A.   newtons per meter.
B.   meters.
C.   newtons.                                                    20%              20%
D.   newtons times meters.
E.   None of these is correct;
the coefficient of friction
is dimensionless.                                      20%                         20%

20%

A.   B.    C.   D.   E.

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21   22   23   24   25   26   27   28   29   30
The SI units for the coefficient of friction are

A.   newtons per meter.
B.   meters.
C.   newtons.
D.   newtons times meters.
E.   None of these is correct; the coefficient of
friction is dimensionless.
20%          20%        20%   20%           20%
Which free-body diagram best
represents the forces acting on
the student sliding down a
rough incline?
1.    A
2.    B
3.    C
4.    D
5.    E                             1        2           3         4         5

1    2    3    4    5    6     7    8    9    10   11   12   13       14   15    16    17   18       19   20
21   22   23   24   25   26    27   28   29   30
Which free-body diagram best
represents the forces acting on the
student sliding down a rough
incline?
Circular motion
An object traveling in a circle at constant speed
A. is moving with constant                                                        20% 20% 20% 20% 20%
velocity.
B. may be slowing down or
picking up speed.
C. experiences no
acceleration.
D. experiences an
acceleration toward the
center of the circle.
E. none of the above

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1    2    3    4    5    6    7    8    9    10   11        12     13        14        15        16        17        18       19      20
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21   22   23   24   25   26   27   28   29   30
An object traveling in a circle at constant speed

A.   is moving with constant velocity.
B.   may be slowing down or picking up speed.
C.   experiences no acceleration.
D.   experiences an acceleration toward the center
of the circle.
E.   none of the above
A car going around a curve of radius R at a speed
V experiences a centripetal acceleration ac. What
is its acceleration if it goes around a curve of
radius 3R at a speed of 2V? 20% 20% 20% 20% 20%

A. (2/3)ac
B. (4/3)ac
C. (2/9)ac
D. (9/2)ac
E. (3/2)ac                                                    c

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1    2    3    4    5    6    7    8    9    10   11    12        13        14    15       16    17     18   19         20
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/3

/9

/2

/2
(2

(4

(2

(9

(3
21   22   23   24   25   26   27   28   29   30
A car going around a curve of radius R at a speed
V experiences a centripetal acceleration ac. What
is its acceleration if it goes around a curve of
radius 3R at a speed of 2V?

A.   (2/3)ac
B.   (4/3)ac
C.   (2/9)ac
D.   (9/2)ac
E.   (3/2)ac
The figure shows a top view of a ball on the end of a string
traveling counterclockwise in a circular path. The speed of
the ball is constant. If the string should break at the instant
shown, the path that the ball would follow is

A.   20%
1
B.   20%
2
C.   3
20%
D.   4
20%
E.   impossible to tell from the given information.
20%

1    2    3    4    5    6    7    8    9    10   11   12   13   14   15   16   17   18   19   20
21   22   23   24   25   26   27   28   29   30
The figure shows a top view of a ball on the end of
a string traveling counterclockwise in a circular
path. The speed of the ball is constant. If the string
should break at the instant shown, the path that the

A.   1
B.   2
C.   3
D.   4
E.   impossible to tell from the given information.
The figure shows a top view of a ball on the end of a string
traveling counterclockwise in a circular path. Assume that
air resistance is negligible. Which free-body diagram best
represents the net force acting on the ball?
1.   A                                                      20%       20%       20%      20%        20%
2.   B
3.   C
4.   D
5.   E

1    2    3    4    5    6    7    8    9    10   11   12   13   14       15   16   17   18    19    20
A

E
B

C

D
21   22   23   24   25   26   27   28   29   30
The figure shows a top view of a
ball on the end of a string traveling
counterclockwise in a circular path.
Assume that air resistance is
negligible. Which vector best
represents the acceleration of the
ball?
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Work and Energy
A body moves with decreasing speed. Which of the
following statements is true?

A. The net work done on the body is positive, and the kinetic
energy is increasing.                                  78%

B. The net work done on the body is positive, and the kinetic
energy is decreasing.
C. The net work done on the body is zero, and the kinetic
energy is decreasing.                      22%
D. The net work done on the body is negative, and the
kinetic energy is increasing.           0%      0% 0%
E. The net work done on the body is negative, and the

..
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kinetic energy is decreasing.

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1    2    3    4    5    6    7    8    9    10   11        12   13        14   e    15        16     17        18    19          20
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21   22   23   24   25   26   27   28   29   30
A body moves with decreasing speed. Which of the
following statements is true?

A. The net work done on the body is positive, and the kinetic
energy is increasing.
B. The net work done on the body is positive, and the kinetic
energy is decreasing.
C. The net work done on the body is zero, and the kinetic
energy is decreasing.
D. The net work done on the body is negative, and the
kinetic energy is increasing.
E. The net work done on the body is negative, and the
kinetic energy is decreasing.
The SI unit of energy can be expressed as

20% 20% 20% 20% 20%
A.    kg · m/s
B.    kg · m/s2
C.    m/(kg · s)
D.    kg · m · s2
E.    kg · m2 / s2

2
2
2

)
/s

·s

/s
·s
/s
·m

·m

g

2
·m
/(k

·m
kg

kg

1     2    3    4    5    6    7    8    9    10   11   12        13    14         15       16      17    18       19       20
m

kg

kg
21    22   23   24   25   26   27   28   29   30
The SI unit of energy can be expressed as

A. kg · m/s
B. kg · m/s2
C. m/(kg · s)
D. kg · m · s2
E. kg · m2 / s2
Negative work means
89%

A. the kinetic energy of the object increases.
B. the applied force is variable.
C. the applied force is perpendicular to the
displacement.
D. the applied force is opposite to the displacement.
11%
E. nothing; there is no such thing as negative work.
0% 0%                                                                                       0%

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1    2     3    4    5    6    7    8    9    10   11        12         13        14     e   15        16        17        18        19         20
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21   22    23   24   25   26   27   28   29   30
Negative work means

A. the kinetic energy of the object increases.
B. the applied force is variable.
C. the applied force is perpendicular to the
displacement.
D. the applied force is opposite to the
displacement.
E. nothing; there is no such thing as negative work.
If mechanical work is done on a body, the body
must
20% 20% 20% 20% 20%

A.    accelerate.
B.    be in equilibrium.
C.    not exert any force.
D.    have no friction force exerted on it.
E.    move.

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1     2    3    4    5    6    7    8    9    10   11   12   13        14       15           16      17          18     19      20

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21    22   23   24   25   26   27   28   29   30
If mechanical work is done on a body, the body
must

A. accelerate.
B. be in equilibrium.
C. not exert any force.
D. have no friction force exerted on it.
E. move.
Consider two engines. The larger is rated at 2 W
and the smaller at 1 W. The smaller one can do a
certain quantity of work in 2 h. The larger can do
twice as much work in a time of          78%

A.   30 min
B.   1h
C.   2h
D.   4h
11%       11%
E.   1.4 h
0%        0%

h
in

h

h

h
m

4
1

2

4
1    2    3    4    5    6    7    8    9    10   11    12    13   14   15   16   17       18   19       20

1.
30

21   22   23   24   25   26   27   28   29   30
Consider two engines. The larger is rated at 2 W
and the smaller at 1 W. The smaller one can do a
certain quantity of work in 2 h. The larger can do
twice as much work in a time of

A. 30 min
B. 1 h
C. 2 h
D. 4 h
E. 1.4 h
A skier of mass 50 kg is moving at speed 10 m/s at point P1
down a ski slope with negligible friction. What is the skier’s
kinetic energy when she is at point P2, 20 m below P1?
20%           20%          20%       20%           20%

P1
A.   2500 J
B.   9800 J
C.   12300 J
D.   13100 J                  H =20m
E.   15000 J

P2
J

J

J

J

J
00

00

0

0

0
30

10

00
1    2    3    4    5    6    7    8    9     10   11   12       13    14      15        16   17       18    19       20
25

98

12

13

15
21   22   23   24   25   26   27   28   29    30
A skier of mass 50 kg is moving at speed 10 m/s at point P1
down a ski slope with negligible friction. What is the skier’s
kinetic energy when she is at point P2, 20 m below P1?

P1
A. 2500 J
B. 9800 J
C. 12300 J          H =20m
D. 13100 J
E. 15000 J
P2
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Conservation of
Energy
Susana ascends a mountain via a short, steep
trail. Sean ascends the same mountain via a long,
gentle trail. Which of the following statements is
true?                          20%  20%  20% 20%   20%

A. Susana gains more PEg than Sean.
B. Susana gains less PEg than Sean.
C. Susana gains the same PEg as Sean.
D. To compare energies, we must know the height of the
mountain.
E. To compare energies, we must know the lengths of the
two trails.

1    2    3    4    5    6    7    8    9    10   11        12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.             B.         C.         D.         E.
Susana ascends a mountain via a short, steep
trail. Sean ascends the same mountain via a long,
gentle trail. Which of the following statements is
true?
A. Susana gains more gravitational potential energy than
Sean.
B. Susana gains less gravitational potential energy than
Sean.
C. Susana gains the same gravitational potential
energy as Sean.
D. To compare energies, we must know the height of the
mountain.
E. To compare energies, we must know the lengths of the
two trails.
The reference point for gravitational potential
energy
A. must be at the initial position of the object.     78%
B. must be at the final position of the object.
C. must be at ground level.
D. must be at the lowest position ever reached by the
object.
E. can be chosen arbitrarily.

11%               11%

0%                        0%
1      2   3    4    5    6    7    8    9    10   11        12   13    14   15    16   17    18   19    20
21    22   23   24   25   26   27   28   29   30        A.             B.         C.         D.         E.
The reference point for gravitational potential
energy
A. must be at the initial position of the object.
B. must be at the final position of the object.
C. must be at ground level.
D. must be at the lowest position ever reached by the
object.
E. can be chosen arbitrarily.
Which of the following statements is true?

A. The kinetic and potential energies of an object must
always be positive quantities.                      44%

B. The kinetic and potential energies of an object must
always be negative quantities.
C. Kinetic energy can be negative but potential energy
cannot.
22%               22%
D. Potential energy can be negative but kinetic energy
cannot.
E. None of these statements is true.       11%

0%
1    2    3    4    5    6    7    8    9    10   11        12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.             B.         C.         D.         E.
Which of the following statements is true?

A. The kinetic and potential energies of an object must
always be positive quantities.
B. The kinetic and potential energies of an object must
always be negative quantities.
C. Kinetic energy can be negative but potential energy
cannot.
D. Potential energy can be negative but kinetic
energy cannot.
E. None of these statements is true.
A projectile of mass m is propelled from ground level with
an initial kinetic energy of 450 J. At the exact top of its
trajectory, its kinetic energy is 250 J. To what height, in
meters, above the starting point does the projectile rise?
20%
Assume air resistance is negligible. 20% 20% 20% 20%

A.       450/(mg)
B.       250/(mg)
C.       700/(mg)
D.       200/(mg)
E.       350/(mg)
1    2    3    4    5    6    7    8    9    10   11    12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.         B.         C.         D.         E.
A projectile of mass m is propelled from ground
level with an initial kinetic energy of 450 J. At the
exact top of its trajectory, its kinetic energy is 250
J. To what height, in meters, above the starting
point does the projectile rise? Assume air
resistance is negligible.

A. 450/(mg)
B. 250/(mg)
C. 700/(mg)
D. 200/(mg)
E. 350/(mg)
A roller coaster starts from rest at point A. If you ignore friction
and take the zero of potential energy to be at C,

20%            20%    20%        20%        20%

A.       KE of the coaster at D will be equal to PEg at A.
B.       KE of the coaster at E will be equal to PEg at C.
C.       KE of the coaster at C will be equal to its PEg at B.
D.       KE of the coaster at B will be equal to its PEg at C.
E.       KE of the coaster at C will be equal to its PEg at A.

1    2     3    4    5    6    7    8    9    10   11        12   13    14   15    16   17    18   19    20
21   22    23   24   25   26   27   28   29   30        A.             B.         C.         D.         E.
A roller coaster starts from rest at point A. If you
ignore friction and take the zero of potential energy
to be at C,

A. the kinetic energy of the coaster at D will be equal
to its potential energy at A.
B. the kinetic energy of the coaster at E will be equal to
its potential energy at C.
C. the kinetic energy of the coaster at C will be equal
to its potential energy at B.
D. the kinetic energy of the coaster at B will be equal to
its potential energy at C.
E. the kinetic energy of the coaster at C will be
equal to its potential energy at A.
A block is released from rest on a frictionless
incline, as shown. It slides down and compresses
a spring. Which statement is true?
20%        20%    20%        20%       20%

A.   KE of the block just before it
collides with the spring will be
equal to mgh.
B.   KE of the block when it has fully
compressed the spring will be
equal to mgh.
C.   KE of the block when it has fully
compressed the spring will be
zero.
D.   KE of the block just before it
collides with the spring will be
½kx2.
E.   None of the above.

1    2    3    4    5    6    7    8    9    10   11    12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.         B.         C.         D.         E.
A block is released from rest on a
frictionless incline, as shown. It slides
down and compresses a spring. Which
statement is true?

A. The kinetic energy of the block just before it collides with
the spring will be equal to mgh.
B. The kinetic energy of the block when it has fully
compressed the spring will be equal to mgh.
C. The kinetic energy of the block when it has fully
compressed the spring will be zero.
D. The kinetic energy of the block just before it collides with
the spring will be ½kx2.
E. None of the above.
Consider the energy conservation for the system
consisting of both you and the Earth. Is total
energy conserved for this system?
33%             33%              33%
A. Yes
B. No
C. Unable to determine.

1    2    3    4    5    6    7    8    9    10   11   12    13   14   15    16   17   18   19   20
21   22   23   24   25   26   27   28   29   30         A.                  B.              C.
Consider the energy conservation for the
system consisting of both you and the Earth.
Is total energy conserved for this system?

A)Yes.
B)No.
C)Unable to determine.
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Conservation of Linear Momentum
The SI units of momentum are

100%
A.       kg · m · s
B.       m2/s
C.       kg · s/m
D.       kg/J
E.       kg · m/s

·s   0%        0%           0%     0%

/m

/s
/J
s
2/

·m
kg
·s
·m

1    2     3   4    5    6    7    8    9    10   11   12    13       14     15    16    17    18   19        20
m

kg

kg
kg

21   22   23   24   25   26   27   28   29   30
The SI units of momentum are

A. kg · m · s
B. m2/s
C. kg · s/m
D. kg/J
E. kg · m/s
Two masses M and 5M rest on a horizontal
frictionless table with a compressed spring of
negligible mass between them. When the spring is
20% 20% 20% 20%   20%
released, the energy of the spring is shared
between the two masses in such a way that

A. M gets 3/5 of the energy.
B. M gets 1/6 of the energy.
C. M gets 1/5 of the energy.
D. M gets 4/5 of the energy.
E. M gets 5/6 of the energy.

1    2    3    4    5    6    7    8    9    10   11    12   13    14   15    16   17    18   19    20
21   22   23   24   25   26   27   28   29   30        A.         B.         C.         D.         E.
Two masses M and 5M rest on a horizontal
frictionless table with a compressed spring of
negligible mass between them. When the spring is
released, the energy of the spring is shared
between the two masses in such a way that

A.   M gets 3/5 of the energy.
B.   M gets 1/6 of the energy.
C.   M gets 1/5 of the energy.
D.   M gets 4/5 of the energy.
E. M gets 5/6 of the energy.
Momentum is conserved in which of the
following?
20%        20%    20%        20%       20%

A.       elastic collisions
B.       inelastic collisions
C.       explosions
D.       collisions between automobiles
when friction from the road is
negligible
E.       All of the above.

1    2     3    4    5    6    7    8    9    10   11    12   13    14   15    16   17    18   19    20
21   22    23   24   25   26   27   28   29   30        A.         B.         C.         D.         E.
Momentum is conserved in which of the
following?
A. elastic collisions
B. inelastic collisions
C. explosions
D. collisions between automobiles when
friction from the road is negligible
E. All of the above.
A boy and girl on ice skates face each other. The girl has a
mass of 20 kg and the boy has a mass of 30 kg. The boy
pushes the girl backward at a speed of 3 m/s. As a result
of the push, the speed of the boy is
100%

A.    zero
B.    2 m/s
C.    3 m/s
D.    4.5 m/s
E.    9 m/s

0%                     0%         0%         0%

/s
/s

/s

/s
ro

m
m

m

m
ze

1     2    3    4    5    6    7    8    9    10   11   12    13       14   15       16   17     18   19     20

5
2

3

9
4.
21    22   23   24   25   26   27   28   29   30
A boy and girl on ice skates face each other. The
girl has a mass of 20 kg and the boy has a mass of
30 kg. The boy pushes the girl backward at a
speed of 3 m/s. As a result of the push, the speed
of the boy is
A. zero
B. 2 m/s
C. 3 m/s
D. 4.5 m/s
E. 9 m/s
A golf ball and a Ping-Pong ball are dropped in a
vacuum chamber. When they have fallen halfway
to the floor, they have the same
89%

A.       speed.
B.       potential energy.
C.       kinetic energy.
D.       momentum.                                                                                                       11%
E.       speed, potential energy, kinetic                                               0% 0% 0%
energy, and momentum.

.

.
.
d.

y

gy

..
m
rg

rg
ee

tu
er
ne

ne
en
sp

en
le

le
om
tic
tia

tia
m
ne
n

n
te

te
ki
po

po
d,
ee
1    2     3    4    5    6    7    8    9    10   11   12   13    14         15        16     17        18         19     20

sp
21   22    23   24   25   26   27   28   29   30
In all collisions of short duration and for which it is
true that no external forces act on the collision
participants,
A. kinetic energy is conserved.
B. both momentum and kinetic energy are conserved.
C. neither momentum nor kinetic energy is conserved.
D. the relative velocities before and after impact are
equal and oppositely directed.
E. momentum is conserved.
Calculate the impulse by the force as shown
in the figure below.

F, N
20%           20%        20%        20%    20%

A.    1 mNs                                        2
B.    2 mNs
C.    4 mNs
D.    10 mNs
E.    40 mNs

2              4 t, ms

A.         B.        C.          D.        E.
1     2    3    4    5    6    7    8    9    10    11       12        13   14    15   16    17    18   19   20
21    22   23   24   25   26   27   28   29   30
Calculate the impulse by the force as shown
in the figure below.

F, N
A. 1 mNs
B. 2 mNs         2
C. 4 mNs
D. 10 mNs
E. 40 mNs
2    4 t, ms
Two cars of equal mass travel in opposite
directions at equal speeds. They collide in a
perfectly inelastic collision. Just after the collision,
their velocities are                   89%

A.       zero.
B.       equal to their original velocities.
C.       equal in magnitude but opposite in direction from their original
velocities.
D.       less in magnitude and in the same direction as their original
velocities.                                             11%
E.                                                          0%         0% 0%
less in magnitude and opposite in direction from their original
velocities.

.

..
ro

.
.

b.

...
..

d
al
ze

an
an
de
in
rig

de
tu

de
ni

tu
o

tu
ag

ni
ir

ni
e

ag
m

ag
th

m
n

m
o

li
lt

in
in
ua
ua

ss
1    2     3    4    5    6    7    8    9    10   11   12   13     14         15          16     17         18      19       20

ss
eq
eq

le
le
21   22    23   24   25   26   27   28   29   30
Two cars of equal mass travel in opposite
directions at equal speeds. They collide in a
perfectly inelastic collision. Just after the collision,
their velocities are
A. zero.
B. equal to their original velocities.
C. equal in magnitude but opposite in direction from their
original velocities.
D. less in magnitude and in the same direction as their
original velocities.
E. less in magnitude and opposite in direction from their
original velocities.
What is the physical significance of the area under
the curve shown in the figure?
20% 20% 20% 20% 20%
A.       work
B.       impulse
C.       velocity
D.       acceleration
E.       mass

ty

n
e

s
k

ls

as
io
or

ci
pu

at
lo
w

m
r
ve
im

le
ce
ac
1    2     3   4   5   6   7   8   9   10
What is the physical significance of the area under
the curve shown in the figure?

A. work
B. impulse
C. velocity
D. acceleration
E. mass
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Rotation
Two points, A and B, are on a disk that rotates
about an axis. Point A is three times as far from
the axis as point B. If the speed of point B is v,
then what is the speed of point A?
20%       20%   20%            20%   20%

A. v
B. 3v
C. v/3
D. 9v
E. v/9

A.        B.         C.         D.        E.

1    2    3    4    5    6    7    8    9    10   11   12    13    14   15        16    17   18        19   20
21   22   23   24   25   26   27   28   29   30
Two points, A and B, are on a disk that
rotates about an axis. Point A is three times
as far from the axis as point B. If the speed
of point B is v, then what is the speed of
point A?
A. v
B. 3v
C. v/3
D. 9v
E. v/9
Two objects, m1 and m2, are placed on a horizontal
platform which is rotating at a constant angular
velocity. m1 is located at a distance ½ R from the
axis of rotation and m2 is located at R. The
centripetal acceleration of mass m1 is ____ the
centripetal acceleration of m2.
33%        33%            33%
A. less than
B. equal to
C. greater than

A.             B.             C.

1    2    3    4    5    6    7    8    9    10   11   12   13   14    15   16        17   18        19   20
21   22   23   24   25   26   27   28   29   30
Two objects, m1 and m2, are placed on a
horizontal platform which is rotating at a
constant angular velocity. m1 is located at a
distance ½ R from the axis of rotation and
m2 is located at R. The centripetal
acceleration of mass m1 is ____ the
centripetal acceleration of m2.
A. less than
B. equal to
C. greater than
A wheel rotates with a constant nonzero angular
acceleration. Consider a point, P, at the edge of
the wheel. Which of the following quantities
remains constant in magnitude? 20% 20% 20% 20%                                                            20%

A.        tangential velocity
C.        tangential acceleration
D.        angular velocity
E.        All of these are correct.
A.        B.        C.        D.         E.

1    2      3   4    5    6    7    8    9    10   11   12   13   14   15        16   17   18        19   20
21   22    23   24   25   26   27   28   29   30
A wheel rotates with a constant nonzero angular
acceleration. Consider a point, P, at the edge of
the wheel. Which of the following quantities
remains constant in magnitude?

A.   tangential velocity
C.   tangential acceleration
D.   angular velocity
E.   All of these are correct.
What physical quantity is represented by the slope
of the curve shown on the graph?

20%
A.    displacement
B.
20%    angular acceleration
C.
20%    tangential acceleration
D.
20%    velocity
E.      None of these is correct.
1
20%
2     3    4    5    6    7    8    9    10   11   12   13   14   15   16   17   18   19   20
21    22   23   24   25   26   27   28   29   30
What physical quantity is represented by the
slope of the curve shown on the graph?

A. displacement
B. angular acceleration
C. tangential acceleration
D. velocity
E. None of these is correct.
A 2.0-kg mass is attached to the end of a 5.0-m rope.
The mass moves in a circular path on a horizontal
frictionless surface. If the breaking strength of the
rope is 40 N, the maximum translational speed with
which you can swing the mass without breaking the
rope is approximately

A. 3.2 m/s                                                        20%                              20%
B. 4.0 m/s
20%                                        20%
C. 10 m/s                                                                      20%
D. 20 m/s
E. 0.20 km/s
A.    B.        C.    D.   E.

1     2    3    4    5    6    7    8    9    10   11   12   13   14    15    16        17        18    19   20
21    22   23   24   25   26   27   28   29   30
A 2.0-kg mass is attached to the end of a 5.0-m rope.
The mass moves in a circular path on a horizontal
frictionless surface. If the breaking strength of the
rope is 40 N, the maximum translational speed with
which you can swing the mass without breaking the
rope is approximately

A. 3.2 m/s
B. 4.0 m/s
C. 10 m/s
D. 20 m/s
E. 0.20 km/s
Is the centripetal force an actual force?
1. Yes
50%                 50%
2. No

1                        2
1    2    3    4    5    6    7    8    9    10   11   12   13   14   15   16   17       18   19   20
21   22   23   24   25   26   27   28   29   30
Is the centripetal force an actual force?

A. Yes
B. No
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