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1. Which are units of momentum? a. Nm b. N/s c. Ns d. N/m 2. What is the momentum of a 200 kg truck traveling at 20 m/s? a. 100 kgm/s b. 20,000 kgm/s c. 4,000 kgm/s d. 40,000 kgm/s 3. A ball mass 0.10 kg is dropped from 12-m. Its momentum just as it strikes the ground is: a. 1.5 kgm/s b. 1.8 kgm/s c. 2.4 kgm/s d. 4.8 kgm/s 4. A 0.060-kg tennis ball, initially moving at 12 m/s, is struck by a racquet causing it to move in the opposite direction at a speed of 18 m/s. What is its change in momentum? a. 0.36 kgm/s b. 0.72 kgm/s c. 1.1 kgm/s d. 1.8 kgm/s A small car meshes (sticks to) a large truck in a head on collision. Which of the following statements about the magnitude of the force is true? JonE A lot on ei write aluol in a. The truck experiences the greater average force b. The car experiences the greater average force goal 000 a 2bmo 1not aun 01 gnivom 189 94-0005 A 9 c. The car and truck experience the same average force nomom isnil adr of IndW sardisgot To usyam d. It is impossible to tell since the masses and velocities are not known When a light beach ball rolling with a speed of 6.0 m/s collides with a heavy bowling ball at rest, the speed of the beach ball after the collision will be approximately 0 b. 3.0 m/s c. 6.0 m/s d. 12.0 m/s 7. A 10 g bullet moving at 300 m/s is fired into a 1.0 kg block. The bullet passes through the block (does not embed "itself) and emerges with half its original speed. What is the velocity of the block right after the collision? a. 1.5 m/s b. 2.97 m/s c. 3.00 m/s d. 273 m/s A constant 6.0 N force acts for 4.0 seconds on a 12 kg object. What is the object's change in velocity? a. 2.0 m/s b. 12 m/s c. 18 m/s d. 288 m/s 9. A 0. 1 kg ball is dropped onto a tabletop. The speeds of the ball right before and right after hitting the tabletop are 5 m/s and 4 m/s respectively. If the collision between ball and table lasts for 0.15 seconds, what is the magnitude of the average force exerted on the ball by the table? a. 0.67 N b. 1.3 N c. 3.0 N d. 6.0 N 10. Two equal mass balls (one red and the other blue) are dropped from the same height, and rebound off the floor. The red ball rebounds to a higher position. Which ball is subjected to the greater impulse during its collision with the floor? a. It's impossible to tell since the time intervals and forces are not known b. Both balls experienced the same impulse. c. The blue ball The red ball. 11. A 10-kg object traveling at 6 m/s collides head on with a 2-kg object at rest. What is the total momentum of the system after the collision? 12. A hand grenade is on the ground at rest. After a minute it explodes into 150 different sized fragments. After the explosion: a. What is the total momentum of the fragments? b. How does the total KE of the fragments compare with the total KE before the explosion