physics

5. one member of which acts on one object, and one member of which acts on the other object.
9. the resistance that one surface or object encounters when moving over another.
10. any object thrown into space upon which the only acting force is gravity.
12. (of a quantity) having only magnitude, not direction.
14. The push or pull on an object with mass causes it to change its velocity.

1. a certain amount of force you apply for a certain amount of time to cause a change in momentum
2. ce the sum of all the forces acting on an object
3. a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.
4. the quantity of motion of a moving body, measured as a product of its mass and velocity.
6. the rate of change of velocity per unit of time.
7. a quantity that has both magnitude and direction.
8. the moving of something from its place or position.
11. A measure of the amount of matter contained in or constituting a physical body
12. The rate of change of position of an object in any direction.
13. the force by which a planet or other body draws objects toward its center.