| A | B |
|---|
| motion | object's change in position over time |
| speed | rate at which an object moves |
| average speed | calculated by dividing distance by time |
| velocity | speed of an object in a particular direction |
| acceleration | the rate at which velocity changes |
| force | a push or pull |
| newton | SI unit of force |
| net force | results from combining all the forces acting on an object |
| unbalanced force | produces a change in motion |
| friction | force that opposes motion |
| gravity | force of attraction between objects |
| weight | measure of gravitational force on an object |
| mass | amount of matter in an object |
| inertia | an object's resistance to any change in motion |
| momentum | property of an object that depends on the object's mass and velocity |
| potential energy | energy of an object's position |
| kinetic energy | energy of motion |
