Exam 5 Numbers 1-5 Physics 2016-2017
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- 1.When comparing the momentum of two moving objects, which of the following is correct?
- A.
The object with the higher velocity will have less momentum if the masses are equal.
- B.
The more massive object will have less momentum if its velocity is greater.
- C.
The less massive object will have less momentum if the velocities are the same.
- D.
The more massive object will have less momentum if the velocities are the same.
- 2.Two skaters stand facing each other. One skater’s mass is 60 kg, and the other’s mass is 72 kg. If the skaters push away from each other without spinning,
- A.
The lighter skater has less momentum.
- B.
Their momenta are equal but opposite.
- C.
Their total momentum doubles.
- D.
Their total momentum decreases.
- 3.In a two-body collision,
- A.
Momentum is always conserved.
- B.
Kinetic energy is always conserved.
- C.
Neither momentum nor kinetic energy is conserved.
- D.
Both momentum and kinetic energy are always conserved.
- 4.A person sitting in a chair with wheels stands up, causing the chair to roll backward across the floor. The momentum of the chair
- A.
Was zero while stationary and increased when the person stood.
- B.
Was greatest while the person sat in the chair.
- C.
Remained the same.
- D.
Was zero when the person got out of the chair and increased while the person sat.
- 5.Two swimmers relax close together on air mattresses in a pool. One swimmer’s mass is 48 kg, and the other’s mass is 55 kg. If the swimmers push away from each other,
- A.
Their total momentum triples.
- B.
Their momenta are equal but opposite.
- C.
Their total momentum doubles.
- D.
Their total momentum decreases.
Questions: 5 | Attempts: 62 | Last updated: Mar 3, 2017
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Sample Question11. In what kind of collision is kinetic energy always conserved?
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?
Questions: 5 | Attempts: 79 | Last updated: Jan 30, 2017
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Sample Question1.Which of the following sentences uses work in the scientific sense?
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