vocab words

3. forces acting on an object that combine and form a net force of zero.
5. a push or a pull on an object by another that is touching.
7. the tendency of an object to resist a change in its motion.
10. force forces action on an object that combines a net force that is not a net force of zero.
12. a push or pull on an object.
14. for every action in nature there is an equal and opposite reaction.
16. a measure of how hard it is to stop a moving object.
18. second the acceleration of an object is equal to the net force acting divided by the object's mass.

1. an attractive force that exists between all objects that have mass.
2. the combination of all forces acting on an object.
4. if the net force of an object is zero, the motion of the object will not change.
6. and motion in which an object is moving in a circular motion.
8. force a force that one object can apply to another without touching it.
9. of conservation of momentum the total momentum of a group of objects stays the same unless outside forces act on the object.
11. force In a circular motion a force that acts perpendicular to the direction of motion toward the center.
12. The force that two objects apply to each other.
13. a force that resists the motion of two surface objects that are touching.
15. gravitational force exerted by an object.
17. the amount of matter in an object.