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2. The tendency of an object to resist a change in its motion
4. A principle stating that the total momentum of a group of objects stays the same unless outside forces act on the objects
8. The law that states that for every action there is an equal and opposite reaction
12. A force that one object applies to another object without touching it
15. The combination of all forces acting on an object
16. A contact force that resists the sliding motion of two serfaces that are touching
17. In circular motion a force that acts perpendicular to the motion direction of motion towards the center of the curve
18. The amount of matter in an object

1. Any motion in witch an object is moving along a curved path
3. Law that states that if the net force acting on an object is zero,the motion of the object doesn't change
5. Law that states that the acceleration of an object is equal to the net force
6. A measure of how hard it is to stop a moving object
7. A push or pull on one object by another object that is touching
9. Forces acting on an object that combine and form a net force of zero
10. The forces two objects apply to each other
11. The gravitational force exerted on an object
13. A push or pull on an object
14. An attractive force that exists between all object that have mass