| Term | Definition |
|---|
| friction | the force that one surface exerts on another when the two rub against each other |
| 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 earth |
| free fall | the motion of a falling object when the only force acting on it is gravity |
| projectile | a object that is thrown |
| air resistance | the fluid friction experienced by objects falling through air |
| terminal velocity | the maximum velocity a falling object can achieve |
| weight | the force of gravity on an object at the surface of the planet |
Combine with other sets
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