| A | B |
|---|
| motion | a change in position over time compared to a reference point |
| speed | the rate at which an object moves |
| velocity | speed and direction of a moving object |
| acceleration | the rate of which velocity changes in a given amount of time |
| force | any push or pull on an object, all forces have a size and direction |
| newton | what force is measured in |
| net force | the force that results from combining all the forces exerted on an object |
| friction | a force that opposes motion between two surfaces that are touching, bumps and valleys of two things pushing on eachother |
| gravity | a force of attraction between objects that is due to their masses |
| weight | a measure of the gravitational force exerted of an object, usually by the earth |
| mass | the amount of matter in an object |
| vector | graph-show size and direction of an applied force |
| lubricant | a substance applied to surfaces to reduce the friction between them |
| Vf-Vi/T | acceleration |
| ma | force |
| at2/2 | distance a falling object travels |
| d/t | average speed |
