# FORM A 1

Document Sample

```					PHYS 218                               EXAM 2                                             FORM A
March 28, 2007

FORM A: 1. 2000 kg car is traveling on a banked curved icy road without sliding. The velocity of the
car is 32.0 m/s and the road is banked at an angle of 20.0 degrees. The radius of curvature of the road
is:

A. 9 m.
B. 38 m.
C. 181 m.
D. 287 m.
E. 306 m.

FORM A: 2. A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration
of 1.0 rad/s2 acquires an angular velocity of 5.0 rad/s. The CD continues rotating at 5.0 rad/s for 15.0
seconds and then slows to a stop in 12.0 seconds with a constant angular deceleration. What is the
centripetal acceleration of a point 4.0 cm from the center at the time 10.0 seconds from the start?

A. 0.8 m/s2
B. 1.0 m/s2
C. 1.5 m/s2
D. 1.8 m/s2
E. 2.0 m/s2

Page 1
PHYS 218                               EXAM 2                                            FORM A
March 28, 2007
FORM A: 3. A 5.00 kg box slides up a 10.0 m long frictionless incline at an angle of 20.0 degrees with
the horizontal pushed by a 40.0 Newton force parallel to the incline. The change in kinetic energy is:

A. 232 J.
B. 134 J.
C. 567 J.
D. 375 J.
E. 400 J.

FORM A: 4. A spring-powered dart gun is un-stretched and has a spring constant 16.0 N/m. The
spring is compressed by 8.00 cm and a 5.00 gram projectile is placed in the gun. When the gun is held
horizontally, the velocity of the projectile when it is shot from the gun is:

A. 0.14 m/s.
B. 2.75 m/s.
C. 4.52 m/s.
D. 14.3 m/s.
E. 5.76 m/s.

Page 2
PHYS 218                               EXAM 2                                             FORM A
March 28, 2007
FORM A: 5. A 5.00 gram bullet has a velocity of 300 m/s. It strikes a block of wood and penetrates to
a distance of 10.0 cm. The average force of the block of wood on the bullet is:

A. 1500 N.
B. 2045 N.
C. 2250 N.
D. 2560 N.
E. 5120 N.

FORM A: 6. A ski lift carries passengers up a 150 m high slope at the rate of one chair every 30.0
seconds. If the chair will hold two passengers with a total mass of 190 kg, then the power of the engine
that powers the ski lift is:

A. 4.66 kW.
B. 6.21 kW.
C. 6.99 kW.
D. 9.32 kW.
E. 9.90 kW.

Page 3
PHYS 218                                EXAM 2                                               FORM A
March 28, 2007
FORM A: 7. A 1700 kg car travels at 20 m/s WEST and collides with a 2000 kg car traveling EAST.
The collision is completely inelastic and they both come to rest. What is the velocity of the 2000 kg
car?

A. 17 m/s EAST
B. 14 m/s EAST
C. 17 m/s WEST
D. 14 m/s WEST
E. 12 m/s EAST

FORM A. 8. A 100 kg solid spherical rock (I=2/5 MR2) has a diameter of 50.0 cm. The rock is rolling
down a hill with a velocity of 5.00 m/s. The total kinetic energy (angular + translational) of the rolling
rock is:

A. 200 J.
B. 560 J.
C. 1120 J.
D. 1575 J.
E. 1750 J.

Page 4
PHYS 218                              EXAM 2                                            FORM A
March 28, 2007
FORM A: 9. A 2.00 m long horizontal uniform beam of mass 20.0 kg is supported by a wire as shown
in the figure. The wire makes an angle of 20.0 degrees with the beam. Attached to the beam 1.40 m
from the wall is a ball with a mass of 40 kg. What is the tension in the string?

A. 516 N
B. 397 N
C. 1090 N
D. 746 N
E. 146 N

FORM A: 10. A cube of cork has a density of 0.6 x 103 kg/m3 and floats on water of density 103
kg/m3. If the cube has a volume of 8 cm3, what is the volume of the cork that remains above water?

A.   4.8 x10-6 m3
B.   3.2 x10-6 m3
C.   0.6 x10-6 m3
D.   9.8 x10-6 m3
E.   3.6 x10-6 m3

Page 5

```
DOCUMENT INFO
Shared By:
Categories:
Stats:
 views: 105 posted: 5/27/2010 language: English pages: 5