| A | B |
|---|
| centripetal force | a force that keeps an object moving in a circle |
| net force | the overall force acting on an object when all forces are combined |
| collision | a situation in which two objects in close contact exchange energy and momentum |
| inertia | the resistance of an object to a change in the speed or the direction of its motion |
| momentum | the measure of mass in motion |
| Newton's Third Law | states that every time one object exerts force on another object, the second object exerts a force that is equal in size and opposite in direction |
| Newton's First Law | states that objects at rest remain at rest, and objects in motion remain in motion, unless acted upon by an unbalanced force |
| another way of stating Newton's Third Law | for every action, there is an equal but opposite reaction |
| Newton's Second Law | states that the acceleration of an object increases with increased force and decreases with increased mass |
| a push or a pull | force |
| conservation of momentum | states that the total momentum of a system of objects does not change as long as there are no outside forces acting on them |
