| A | B |
|---|
| speed | how fast position changes |
| velocity | speed and direction |
| vector | arrow representing direction and magnitude |
| acceleration | how fast velocity changes |
| Newton's first law | objects require an unbalanced force to cause motion |
| Newton's second law | force = mass x acceleration |
| Newton's third law | action/reaction |
| gravity | a force exerted by masses |
| gravity strength | depends on mass and distance |
| weight | force of gravity on an object |
| friction | force that resists motion |
