CHAPTER 1 VOCAB

4. the gravitational force exerted on an object
9. any motion in which an object is moving along a curved path
10. a push or pull on an object
13. the forces two objects apply to each other
16. law that states that if the net force acting on the object is zero the motion of the object does not change
17. law that states that the acceleration of an object is equal to the net force exerted on the object divided by the object's mass
18. forces acting on an object that combine and form a net force that is not zero

1. law that states that for every action there is a opposite and equal reaction
2. a push or pull on one object by another object that is touching it
3. a principle stating that the total momentum of a group of objects stays the same unless outside forces act on the objects
5. an attractive force that exists between all objects that have mass
6. the tendency of an object to resist a change in its motion
7. forces acting on an object that combine and form a net force of zero
8. a force that one object applies to another object without touching it
10. a contact force that resists the sliding motion of two surfaces that are touching
11. in circular motion a force that acts perpendicular to the direction of motion toward the center of the curve
12. a measure of how hard it is to stop a moving object
14. the combination of all forces acting on an object
15. the amount of matter in an object