THE LAWS OF MOTION

2. a force that resists the motion of two surfaces that are touching
5. a push or pull on an object
9. forces acting on an object that combine and form a net force of zero
12. an attractive force that exists between all objects that have mass
13. a force that acts perpendicular to the direction of motion, toward the center of a curve
15. the total momentum of a group of objects stays the same unless outside forces act on the objects
18. forces acting on an object that combine and form a net force that is not zero

1. Newton's ________ states; when an object exerts a force on a second object, the second object exerts a force of the same size but in the opposite direction
3. Newton's ________ states that; if the net force of an object is zero, the motion of the object does not change
4. a force that one object can apply to another object without touching it
5. the friction between a surface and a fluid
6. Newton's _______ states that the acceleration of an object is equal to the net force acting on the object divided by the object's mass
7. the tendency of an object to resist a change in its motion
8. the gravitational force exerted on an object
10. any motion in which an object is moving along a curved path
11. a push or pull on one object by another that is touching it
14. is the amount of matter in an object
16. the combination of all the forces acting on an object
17. opposes the motion of surfaces sliding past each other