Preap Physics Exam #5 Numbers 1-5

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1. 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.

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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.

A. their total momentum triples.

B. their momenta are equal but opposite.

C. their total momentum doubles.

D. their total momentum decreases.

A. the lighter skater has less momentum.

B. their momenta are equal but opposite.

C. their total momentum doubles.

D. Their total momentum decreases.

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.

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