vocab words

1. the difference between the initial, or starting, position and the final position.
6. a measure of the change in velocity during a period of time.
7. force, a push or a pull on one object by another object that is touching it.
8. the speed and direction of a moving object.
10. third law of motion, when an object applies force on another object, the second object applies force of the same strength on the first object but the force is in the opposite direction.
12. an attractive force that exists between all objects that have mass.
13. a push or pull on an object.
14. force, the combination of all of the forces acting on an object.
15. first law of motion, an object at rest will stay at rest and an object in motion will stay in motion unless a force acts on the object.

2. A measure of the distance an object travels in a given amount of time.
3. force, a force one object applies to another object without touching it.
4. the gravitational force exerted on an object.
5. a contact force that resists the sliding motion of two surfaces that are touching.
9. pair, the two forces two objects apply to each other.
11. second law of motion, law that states that the acceleration of an object is equal to the net force exerted on the object divided by the objects mass.