Leah

2. an object in motion stays in motion, an object at rest stays at rest
4. a push or pull on an object
6. force a force that one object that can apply to another object without touching it
8. the total momentum of a group of objects stays the same unless outside forces act on the objects
15. measure of how hard it is to stop a moving object
17. force the combination of all the forces acting on an object
18. forces acting on an object that combine and form a net force of zero

1. any motion in which an object is moving along a curved path
3. gravitational force exerted on an object
4. a force that resists the motion of two surfaces that are touching
5. in circular motion, a force that acts perpendicular to the direction of motion, toward the center of the curve
7. a push or pull on one object by another that is touching it
9. when one object exerts a force on a 2nd object, the 2nd object exerts an equal force the opposite direction
10. amount of matter in an object
11. forces acting on an object that combine and form a net force that is not zero
12. 2nd Law Acceleration = Force/Mass
13. the tendency of an object to resist a change in its motion
14. forces 2 objects apply to each other
16. an attractive force that exists between all objects that have mass