| A | B |
|---|
| Acceleration | rate of change in velocity, usually expressed in meters per second; involves an increase or decrease in speed and/or a change in direction |
| Air Resistance | force of air on moving objects |
| Centrifugal | circular motion away from center or axis |
| Centripetal Force | the force on an object required to keep this object on a circular path, pulling toward the center of the circle |
| Friction | a force that opposes the relative motion of two material surfaces in contact with one another |
| Gravitation | a force of attraction between two masses |
| Gravity | the observed effect of the force of gravitation |
| Inertia | the property of a body, due to its mass, that causes it to resist any change in its motion unless overcome by a force |
| Momentum | a vector quantity that is the product of an object’s mass and velocity; the general effect of ongoing motion |
| Speed | amount of distance traveled divided by time taken; the time-rate at which any physical process takes place |
| Vector | a physical quantity with both a magnitude and direction |
| Velocity | the time-rate at which a body changes its position; quantity whose magnitude is expressed in units of distance over time |
