Friction and Gravity
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13 terms
Terms | Definitions |
|---|---|
 force | a push or pull |
| friction | the force that one surface exerts on another when the two surfaces rub against each other |
| static friction | friction that acts on objects that are not moving |
| sliding friction | friction that occurs when one solid surface slides over another |
| rolling friction | friction that occurs when an object rolls over a surface |
| fluid friction | friction that occurs as an object moves through a fluid |
| gravity | the force that pulls objects toward each other |
| mass | the amount of matter in an object |
| weight | the force of gravity on an object at the surface of a planet |
| freefall | the motion of a falling object when the only force acting on it is gravity |
| air resistance | the fluid friction experienced by objects falling through the air |
| terminal velocity | the greatest velocity a falling object can achieve |
| projectile | an object that is thrown |
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