Preap Physics Exam #5 Numbers 1-5

5 Questions | Total Attempts: 154  Settings  .

• 1.
When comparing the momentum of two moving objects, which of the following is correct?
• A.

A. The object with the higher velocity will have less momentum if the masses are equal.

• B.

B. The more massive object will have less momentum if its velocity is greater.

• C.

C. The less massive object will have less momentum if the velocities are the same.

• D.

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.

A. the lighter skater has less momentum.

• B.

B. their momenta are equal but opposite.

• C.

C. their total momentum doubles.

• D.

D. Their total momentum decreases.

• 3.
In a two-body collision,
• A.

a. momentum is always conserved.

• B.

b. kinetic energy is always conserved.

• C.

c. neither momentum nor kinetic energy is conserved.

• D.

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.

a. was zero while stationary and increased when the person stood.

• B.

b. was greatest while the person sat in the chair.

• C.

c.remained the same.

• D.

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.

A. their total momentum triples.

• B.

B. their momenta are equal but opposite.

• C.

C. their total momentum doubles.

• D.

D. their total momentum decreases. Back to top