


a. unchanged 
b. zero 
c. quadrupled 
d. doubled 
2. An object of mass m undergoes a velocity change of Dv in a time of t seconds; this results in a force of F. If the mass is reduced to 1/4 m and the time increased to 2t, then the new force would be
a. 2F b. 6F c. 8F d. (1/8)F e. (1/2)F
3. The diagram below depicts the changes in velocity of a ball which undergoes a collision with a wall. Indicate which case (A or B or both the same) has the greatest change in velocity, greatest acceleration, greatest momentum change, and greatest impulse.




4. A large truck and a Volkswagon have a headon collision. Answer T (truck), VW (Volkswagon) or S (both the same).
a. Which vehicle experiences the greatest force of impact? ______________
b. Which vehicle experiences the greatest acceleration? ______________
c. Which vehicle experiences the greatest impulse? ______________
d. Which vehicle experiences the greatest momentum change? ______________
5. Rhonda, who has a mass of 40.0 kg, is riding at 30.0 m/s in her sports car when she must suddenly slam on the brakes to avoid hitting a dog crossing the road. She is wearing her seat belt, which brings her body to a stop in 0.200 s. What average force does the seat belt exert on her? PSYW
6. A force of 500 N causes a 80kg fullback to change his velocity by 8 m/s. Determine the impulse experienced by the fullback. PSYW
7. An 900kg car is brought from 32 m/s to 24 m/s over a time period of 3.0 seconds. Determine the force experienced by the car. PSYW
8. Jocko the clown, who has a mass of 75.0 kg and stands at rest on the ice, catches a 25.0kg ball that is thrown to him at 10.0 km/hr. Jocko catches the ball and slides across the ice after the "collision". With what speed does Jocko (and the ball) move across the ice after the collision? Organize your work (a momentum table is a great idea) and show a clear solution to the problem. Accompany your answer by appropriate units.
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© Tom Henderson, 19962004
Last updated on 12/9/04.