Motion Vocabulary

2. the action that one surface or object rubbing against each other
6. the force that attracts a body toward the center of the earth, or toward any other physical body having mass
8. when the speed of an object remainsin the same
10. speed of motion,action or operation
13. increase in the rate or speed of some
14. equal in size and opposite in direction
15. a tendency to do nothing or to remain unchanged.
19. the moving of something from its place or position
20. the time a driver spends out of a heavy vehicle or in an approved sleeper berth of a stationary heavy vehicle.
21. the action or process of being moved or moving
22. an object will not change its motion unless a force acts on it

1. the acceleration of an object in free fall within a vacuum
3. strength or energy as an attribute of physical action or movement.
4. not impeded by or creating friction; smooth.
5. the amount of matter or substance that makes up an object
7. are not equal in magnitude and may or may not act in the same direction
9. the rate at which someone or something is able to move or operate
11. when the velocity is decreasing
12. when two objects interact, they apply forces to each other of equal magnitude and opposite direction.
16. a period which an action continues
17. a course along which something moves
18. the force on an object is equal to its mass times its acceleration