| A | B |
|---|
| air resistance | force that opposes the motion of objects that move through the air |
| centripetal acceleration | acceleration of an object toward the center of a curved or circular path |
| friction | force that opposes the sliding motion between two touching surfaces |
| gravity | attractive force between two objects that depends on the masses of the objects and the distance between them |
| momentum | property of a moving object that equals its mass times its velocity |
| Newton's 2nd law of motion | states that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration equals the net force divided by the mass |
| Newton's 3rd law of motion | states that when one object exerts a force on a second object, the second object exerts a force on the first object that is equal in strength and in the opposite direction |
| sliding friction | frictional force that opposes the motion of two surfaces sliding past each other |
| static friction | frictional force that prevents two surfaces from sliding past each other |
| weight | gravitational force exerted on an object |
| centripetal force | a net force that is directed toward the center of a curved or circular path |
| net force | the combination of all forces acting on an object |
| acceleration | the rate of change of velocity which occurs when an object changes speed or direction |
| velocity | describes the speed and direction of a moving object |
| Newton's 1st law of motion | an object moving at a constant velocity keeps moving at that velocity unless an unbalanced net force acts on it |
