Motion

7. does not change its position with respect to its surroundings with time
8. strength or energy as an attribute of physical action or movement
9. one force is greater than another, the forces are not balanced
10. 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
11. not moving in the laboratory frame
15. a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force
16. equal in size and opposite in direction

1. the time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it
2. the rate of change of velocity per unit of time
3. how much ground an object has covered
4. how far out of place an object is
5. the rate and direction of an object's movement
6. the force that attracts a body toward the center of the Earth, or toward any other physical body having mass
8. the resistance that one surface or object encounters when moving over another
12. when two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction
13. the time rate at which an object is moving along a path
14. the quantity of matter which a body contains