Motion Vocabulary

3. a course along which someone or something moves
7. (3) laws that explain gravity,force and motion
9. the rate of change of its position with respect to a frame of reference
10. every massive particle in the universe attracts every other massive particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between them
13. two forces acting on an object are not equal in size
14. the acceleration is in the same direction as the velocity
16. the amount of matter it contains
18. a place where someone or something is located or has been put
19. the force resisting the relative motion

1. no resistance between a surface or substance
2. an object in free fall within a vacuum
4. the resistance of any physical object to any change in its velocity
5. is that rest is prison while stationary is one who, or that which, is stationary, such as a planet when apparently it has neither progressive nor retrograde
6. When the speed of an object remains the same - it does not increase or decrease
8. changes its position
11. two forces acting on an object are equal in size but act in opposite directions
12. the rate of change of the velocity of an object with respect to time
15. force of attraction acting between all matter
17. the moving of something from its place or position