Preap Physics Exam #5 Numbers 6-10
.
- 1.
6. A 75 kg person walking around a corner bumped into an 80 kg person who was running around the same corner. The momentum of the 80 kg person
- A.
A. increased.
- B.
B. remained the same.
- C.
C. decreased.
- D.
D. was conserved.
Correct Answer
C. C. decreased. -
- 2.
7. The law of conservation of momentum states that
- A.
A. the total initial momentum of all objects interacting with one another usually equals the total final momentum.
- B.
B. The total initial momentum of all objects interacting with one another does not equal the total final momentum.
- C.
C. the total momentum of all objects interacting with one another is zero.
- D.
D. the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects.
Correct Answer
D. D. the total momentum of all objects interacting with one another remains constant regardless of the nature of the forces between the objects. -
- 3.
8. When two ice skaters initially at rest push off one another, their final momenta are
- A.
a. equal in magnitude and direction.
- B.
b. equal in magnitude and opposite in direction.
- C.
c. in the same direction but of different magnitudes
- D.
d. in opposite directions and possibly of different magnitudes.
Correct Answer
B. b. equal in magnitude and opposite in direction. -
- 4.
9. When two objects interact in an isolated system,
- A.
a. the momentum of each object is conserved.
- B.
b. the total momentum of the system is zero.
- C.
c. the total momentum is conserved only if the objects move in opposite directions.
- D.
d. the total momentum is always conserved.
Correct Answer
D. d. the total momentum is always conserved. -
- 5.
10. Conservation of momentum follows from
- A.
A. Newton’s first law.
- B.
B. Newton’s second law.
- C.
C. Newton’s third law.
- D.
D. the law of conservation of energy.
Correct Answer
C. C. Newton’s third law. -
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Mar 22, 2022Quiz Edited by
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Feb 02, 2015Quiz Created by
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