Vocab Chapter 1

3. A principle stating that the total momentum of a group of objects stays the same unless outside forces act on the objects.
5. 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.
7. The combination of all forces acting on an object.
8. The tendency of an object to resist a change in its motion.
10. The gravitational force exerted on an object.
11. A push or pull on an object.
13. A force that one object applies to another object without touching it.
17. Any motion in which an object is moving along a curved path.
18. A measure of how hard it is to stop a moving object.
19. A contact force that resists the sliding motion of two surfaces that are touching.

1. Forces acting on an object that combine and form a net force that is not zero.
2. Forces acting on an object that combine and form a net force of zero.
4. Law that states that if the net force acting on an object is zero, the motion of the object does not change.
6. Law that states that for every action there is an equal and opposite reaction.
9. The force acting on an object in curvilinear motion directed towards the axis of rotation or center of curvature.
12. A push or pull on one object by another object that is touching it.
14. An attractive force that exists between all objects that have mass.
15. The amount of matter in an object.
16. The forces of two objects apply to each other.