Download ExamView Pro

Name: ________________________ Class: ___________________ Date: __________
ID: A
Homework 2
Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
____
____
____
____
____
____
____
____
1. Kinetic energy is conserved in
a. an inelastic collision.
b. an elastic collision.
c. any collision where two objects rebound off each other.
d. none of the above.
2. Work is done on an object when
a. it moves in a circle at constant speed
b. it is accelerated in a straight line
c. it is carried horizontally at constant speed
d. all of the above
3. If a force on an object is aimed opposite the direction of the object's velocity, the force does
a. no work
b. positive work
c. negative work
d. any of the above
4. If a force on an object is aimed perpendicular to the direction of the object's velocity, the force does
a. no work
b. positive work
c. negative work
d. any of the above
5. A skater pulls her arms inward, causing her rotation rate to speed up. Kinetic energy
a. is definitely conserved.
b. is definitely not conserved.
c. may or may not be conserved.
d. none of the above.
6. A skater pulls her arms inward, causing her rotation rate to speed up. Angular momentum
a. is definitely conserved.
b. is definitely not conserved.
c. may or may not be conserved.
d. none of the above.
7. You carry a 20 N box up a flight of stairs, raising its elevation by 5 m. The increase of potential energy of the
box is
a. 0.
b. 4 J.
c. 100 J.
d. none of the above.
8. You carry a 20 N box up a flight of stairs, raising its elevation by 5 m. The work you do is
a. 0.
b. 4 J.
c. 100 J.
d. none of the above.
1
Name: ________________________
ID: A
____
9. A kid slides down an icy (frictionless) hill starting from rest. At the top his gravitational potential energy is
500 J. He slides part way down the hill to a point where his gravitational potential energy is 200 J. His kinetic
energy at that point will be
a. 200 J.
b. 300 J.
c. some unknown value between 0 and 500 J
d. none of the above
____ 10. The pressure exerted by a gas is the result of
a. the Bernoulli effect.
b. molecular collisions.
c. Pascal's principle.
d. the ideal gas law.
e. none of the above.
____ 11. If the same-sized force is made to act over a smaller area, the pressure is
a. decreased.
b. increased.
c. unchanged.
d. dependent upon the shape of the area.
2
ID: A
Homework 2
Answer Section
MULTIPLE CHOICE
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
ANS:
B
B
C
A
B
A
C
C
B
B
B
1