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motion/force week 4
| Term | Definition |
|---|---|
| friction | A force that opposes the motion of a body across a surface or through a gas or liquid. |
| gravity | A force that exists between any two objects that have mass. |
| speed: | Distance traveled per unit of time. |
| velocity: | The speed and direction of moving objects. |
| acceleration: | A change in the velocity (speed, direction, or both) of a body. |
| deceleration: | slowing down |
| Scale: | description of the relative size or amount of 2 or more things; a device used for measuring weight |
| Resist: | to push or act against |
| Kilogram: | metric unit for describing mass |
| Attract: | to pull towards |