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```					Multiple Choice
Questions

N                             m2
F
m1

f                q

mg           Force and Motion

14 Multiple Choice Questions 05.ppt
Question 1

a1                           a2
F2           F2            F1
m                             m
F1

Two forces acting on a block of mass m produce an
acceleration. When the two forces act in the same direction
the acceleration is a1. When the two forces act in opposite
directions the acceleration is a2. Force F1 is

14 Multiple Choice Questions 05.ppt
Question 2

a1                           a2
F2           F2            F1
m                             m
F1

Two forces acting on a block of mass m produce an
acceleration. When the two forces act in the same direction
the acceleration is a1. When the two forces act in opposite
directions the acceleration is a2. Force F2 is

14 Multiple Choice Questions 05.ppt
Question 3
I               II                 III
d              d               d

t               t                t
Three objects can only move along a straight, level path.
The graphs above show the position d of each of the
objects plotted as a function of time t. The sum of the
forces on the object is zero in which of the cases?

(A) II only
(B) III only
(C) I and II only
(D) I and III only
(E) I, II, and III
14 Multiple Choice Questions 05.ppt
Question 4

A ball of mass m is suspended from two strings of unequal
length as shown below. The tensions T1 and T2 in the
strings must satisfy which of the following relations?

14 Multiple Choice Questions 05.ppt
Question 5

A 2 km block slides down a 30° incline as shown above
with an acceleration of 2 m/s2. The magnitude of the
frictional force along the plane is most nearly

(A) 2.5 N
(B) 5 N
(C) 6 N
(D) l0 N
(E) 16 N
14 Multiple Choice Questions 05.ppt
Question 6

When the frictionless system shown above is
accelerated by an applied force of magnitude F,
the tension in the string between the blocks is

14 Multiple Choice Questions 05.ppt
Question7

A push broom of mass m is pushed across a rough
horizontal floor by a force of magnitude T directed at
angle q as shown above. The coefficient of friction
between the broom and the floor is m. The frictional
force on the broom has magnitude

(A) m(mg + Tsinq)
(B) m(mg - Tsinq)
(C) m(mg + Tcosq)
(D) m(mg - Tcosq)
(E) mmg

14 Multiple Choice Questions 05.ppt
Question 8

A 100 newton weight is suspended by two cords as shown
in the figure above. The tension in the slanted cord is
(A) 50 N        (B) l00 N        (C) 150 N
(D) 200 N       (E) 2S0 N

14 Multiple Choice Questions 05.ppt
Question 9

A particle of mass m moves along a straight path
with a speed v defined by the function

v = bt2 + c,   where b and c are constants
and t is time.

The magnitude of the net force on the particle at
time t = t1 is

14 Multiple Choice Questions 05.ppt
Question 10

F
M    m

Two blocks are pushed along a horizontal frictionless
surface by a force F to the right, as shown above.
The force that the bock of mass M ,exerts on block of
mass m is

14 Multiple Choice Questions 05.ppt
Question 11

The position of a toy car moving on a straight track
along the x-axis is given by the equation

x = t3 - 6 t2 + 9 t, where x is in m and t is in s.

The net force on the locomotive is equal to zero when t is
equal to

(A) zero           (B) 2 s          (C) 3 s

(D) 4 s            (E) 5 s

14 Multiple Choice Questions 05.ppt
Question 12
F
q
m

A block of mass m is accelerated across a rough surface by a
force of magnitude F that is exerted at an angle q with the
horizontal, as shown above. The frictional force on the block
exerted by the surface has magnitude f. The acceleration of
the block is

14 Multiple Choice Questions 05.ppt
Question 13
F
q
m

A block of mass m is accelerated across a rough surface by a
force of magnitude F that is exerted at an angle q with the
horizontal, as shown above. The frictional force on the block
exerted by the surface has magnitude f. The coefficient of
friction between the block and the surface is

14 Multiple Choice Questions 05.ppt
Question 14

Atwood’s machine consists of a string, a
frictionless pulley and two mass (m1 and
m2) as shown in the diagram. The
machine moves with constant acceleration
m2
When released. The tension in the string
during acceleration is                     m1

14 Multiple Choice Questions 05.ppt
Question 15
F

A block of mass 5 kg lies on an
inclined plane, as shown above.                                      3m
The horizontal and vertical
supports for the plane have
4m
lengths of 4 m and 3 m,
respectively. The coefficient of friction between the
plane and the block is 0.3. The magnitude of the
force F necessary to pull the block up the plane with
constant speed is most nearly

(A) 33 N          (B) 41 N          (C) 49 N

(D) 55 N          (E) 59 N

14 Multiple Choice Questions 05.ppt
Multiple Choice
Questions

END

14 Multiple Choice Questions 05.ppt

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