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.
- 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.
- 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.
- 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.
- 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.
Questions: 5 | Attempts: 43 | Last updated: Jan 17, 2016
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Sample Question6. 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
Questions: 5 | Attempts: 136 | Last updated: Mar 30, 2017
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Sample QuestionA ball is whirled on a string, then the string breaks. What causes the ball to move off in a straight line?
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Sample QuestionWhich of the following situations represents a positive displacement of a carton? Assume positive position is measured vertically upward along a y-axis.
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