9. A sphere of mass 10 kg is moving at 5 m/s to the right until it smacks into a second stationary sphere of mass 5 kg. After the collision, both spheres travel to the right: the first sphere at 1.67 m/s, and the second sphere at 6.67,m/s. What kind of collision took place? d This is an inelastic (but not perfectly inelastic) collision. This is an elastic or nearly elastic collision. This is a perfectly inelastic collision. This situation is impossible. e. More information is needed. 10. Which of the following equipment is the best choice for investigating elastic or nearly elastic collisions? marble launcher that causes two marbles to collide with each other two sliding carts on a frictionless track that stick together after impact crash test cars with front ends that crumple upon impact to absorb all the initial kinetic energy dropping a bowling ball from a balcony so that it makes a dent in the dirt below a ball of soft clay that flattens when it hits the ground 11. In an inelastic collision, what quantities are conserved? It depends on the masses of the colliding objects. momentum only momentum and kinetic energy neither momentum nor kinetic energy . kinetic energy only 12. Ball A has a mass of 3.0 kg. Ball B has twice the mass of ball A. The two balls collide and stick together in a perfectly ine la stic collision. After the collision the combined balls are at rest. If the velocity of ball A before the collision was 7.4 m/s, what was the velocity of ball B before the collision? 15 m/s b. 3.7 m/s -7.4 m/s 0.0 m/s -3.7 m/'s 13. One sphere of mass 1 kg is moving at 5 m/s to the right until it collides with a stationary, 2 kg sphere. After the collision, both spheres travel to the right: the 1 kg sphere at 1 m/s, and the 2 kg sphere at 2 m/s. What kind of collision took place? More information is needed. an inelastic (but not perfectly inelastic) collision a perfectly in elastic collision This situation is impossible. an elastic collision