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Across 1. a collision in which the objects may stick together, become deformed or generate heat. 3. because it changes the direction of momentum, _____________ generates more force than simply stopping an object 4. because it has direction, velocity is a _______________. 5. the speed of an object plus its direction 7. since mass has no direction, it is a _____________ quantity 8. mass x velocity 10. when a moving train car collides with an identical car at rest, the combined velocity of the two coupled cars will be _________ the velocity of the first car. 11. inertia in motion 12. the amount of matter in an object 14. force x time

Down 1. change in momentum 2. the law of ____________ __ ____________ says that in the absence of an EXTERNAL force, total momentum is unchanged. 6. a collision in which the objects are NOT permanently deformed, do not stick together or generate heat. 9. a golfer follows through with her swing to increase the length of _________ that the force of the club is applied to the ball. 13. any push or a pull