Preap Physics Exam #5 Numbers 1-5
.
- 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.
Questions: 5 | Attempts: 156 | Last updated: Dec 9, 2015
-
Sample Question11. Which of the following is true of the conservation of energy in a closed system?
Questions: 5 | Attempts: 142 | Last updated: Feb 2, 2015
-
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: 132 | Last updated: Feb 2, 2015
-
Sample Question11. Two objects stick together and move with a common velocity after colliding. Identify the type of collision.
Back to top