Answer the following questions.

Multiple Choice [1 mark each] Identify the choice that best completes the statement or answers the question. 1. A 5.0-kg cat travelling at 1.3 m/s [E] has a momentum of a. 3.8 m/s [W] d. 3.8 m/s [E] b. 6.5 m/'s [E] e. none of the above 6.5 m/s [W] 2. A bullet with a momentum of 2.8 kg-m/'s [E] is travelling at a speed of 187 m/s. The mass of the bullet is a. 0.015 g d. 67 g b. 15 g e. not enough information c. 0.067 g 3. A two-dimensional collision occurs as shown below. Before the collision. O 8 After the collision. R Which vector below most closely represents the new velocity of P? A B C D a. A d. D b. B e. E C. C 4. A net force of 12 N changes the momentum of a 250-g ball by 3.7 kg-m/s. The force acts for a. 3.2 s d. 0.81 s b. 0.31 s e. 44 s c. 1.2 s 5. A car with a mass of 1800 kg slows from 42 km/h [E] to 28 km/h [E]. The impulse from the brakes is a. 2.1 x10* N-s [E] d. 2.5 x 10' N-s [W] b. 2.5 x 10' N.s [E] e. 2.1 x 10" N.s [W] c. 7.0 x 10' N-s [W] 6. When you catch a fast-moving baseball, your hand hurts less if you move it in the direction of the ball because a. you decrease the impulse required to stop the ball b. the ball changes momentum more slowly c. the force applied is smaller d. two of A, B, and C e. all of A, B, and C 7. Without knowing any other information than is given in the diagram right, which deductions could be true? a. Both cars had the same speed. b. The eastbound car was travelling faster. C. The northbound car was lighter. d. two of A, B, and C e. all of A, B, and C 8. Which of the following is a scalar quantity? a. momentum b. mass C. velocity d. impulse 9. The roller coaster car starts at point A. At which point is its momentum greatest? a. E b. D C. B 10. Which collision has momentum conserved but not kinetic energy ? a. explosion b. elastic C. closed d. inelastic11. A blazing spike of 0.29 kg volleyball is blocked at the net. It is originally travelling at 18.3 m/s [Right] and bounces straight back at 15 m/s [Left] after being in contact with the blockers arms for a total of 0.02 s. What average force did the blocker exert on the ball? [3 marks] 12. A 0.25-kg snowball moving at 15 m/s [E] collides with a 1.9-kg toy truck travelling at 2.8 m/s [W]. Neglecting friction, calculate the velocity of the snowball if the truck is travelling at 5 m/s [E] after the collision. [3 marks] 13. A 63-kg student stands on a 34-kg cart that is free to move in any direction. The cart and student are moving together with a velocity of 3.2 m/s [W]. The student then starts to walk so that her velocity is 1.8 m/s [N] relative to the floor. Calculate the new velocity of the cart. [5 marks] 14. Two carts of mass 12 kg and 15 kg move toward each other with speeds of 2.3 m/s and 1.5 m/s respectively. If the head on collision between them is perfectly inelastic, calculate the speed of the 15-kg cart after the collision. [3 marks] 15. A truck of mass 3000 kg, moving at 5.0 m/s on a level, icy road, bumps into the rear of a car 1500 kg moving at 2.0 m/s in the same direction [Right]. If the collision is elastic, determine the velocity of each vehicle after the collision. [6 marks]