Unit 2 Terms

4. The force that resists objects sliding past each other
7. A force that opposes motion between surfaces that are in contact
9. The force that opposes movements of surfaces contacting each other while in motion
12. The motion of a body when only the force of gravity is acting on the body
13. An object in motion stays in motion and an object at rest stay at rest unless acted upon by an outside force
14. The total amount of momentum in an isolated system is conserved
16. The unbalanced force acting on an object equals the objects mass times its acceleration
17. A push or pull
19. The force that occurs when objects touch

1. All objects in the universe attract to each other through gravity
2. The amount of gravitational force exerted on an object
3. The force that resists an object rolling across a surface
5. The force that opposes motion between still objects that are sliding past each other
6. The sum of all the forces acting on an object
8. A force of gravity, electromagnetic force, strong nuclear force, etc.
10. The tendency of an object to resist a change in motion
11. For every action there is an equal and opposite reaction
12. The force that doesn't require objects to touch
15. When air resistance and weight are equal, and the object starts accelerating
18. A quantity defined as the product of mass and velocity of an object