Chapter 13

2. Issac Newton explained how forces cause motion to change in 3 rules
7. force that acts to slow objects that are moving in the air
8. the newton law that says the acceleration of an object is in the direction of the net force and equals the net force divided by the mass
10. type of friction created when an object rolls across a surface
11. speed and direction of a moving object
15. force created when two or more forces are exerted on an object and their efforts cancel each other out and the object does not move
16. fall when gravity is the only force that acts on a falling object
17. the force that brings everything to a stop

1. type of friction that occurs between an object and the floor
3. force that exist between any object
4. the study of how the body exerts force
5. tendency for the motion of an object to remain unchanged;depends on the mass of the object
6. amount of gravitational force exerted on an object
9. the newton law that says the net force on an object is zero
12. the newton law that says force acts in equal but opposite pairs
13. amount of matter an object has
14. force all forces acting on an object
16. a push or pull that one object exerts on another
18. resistance prevents an object from moving when a force is applied to it