chapter 2 vocab

4. If the net force on an object is zero, the motion of the object does not change
10. The tendency of an object to resist a change in its motion
11. A measure of how hard it is to stop a moving object
12. The amount of matter in an object
13. A force that resists the motion of two surfaces that are touching
14. a push or a pull on an object
16. In a circular motion, a force that acts perpendicular to the direction of motion, toward the center of its curve
17. The gravitational force exerted on an object
18. The acceleration of an object is equal to the net force acting on the object divided by the objects mass

1. An attractive force that exists between all objects that have mass
2. Forces acting on an object that combine and form a net force of zero
3. The total momentum of a group of objects stays the same unless outside forces act on the objects
5. The forces two objects apply to each other
6. The combination of all the forces acting on an object
7. a push or a pull on an object by another that is touching it
8. When one object exerts a force on the second object, the second object exerts an equal force in the opposite direction on the first object
9. Any motion in which an object is moving along a curved path
15. A force that one object can apply to another object without touching it