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the nature of force
| Term | Definition |
|---|---|
| force | a push or pull exerted on an object. |
| newton | a unit of measure that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second. |
| net force | the overall force on an object when all the individual forces acting on it are added together. |
| friction | the force that two surfaces exert on each other when they rub against each other |
| sliding friction | Friction that occurs when one solid surface slides over another. |
| static friction | fraction that acts between objects that are not moving. |
| fluid friction | Friction that occurs as an object moves through a fluid. |
| rolling friction | Friction that occurs when an object rolls over the surface. |
| gravity | The attractive force between two objects; the force that moves objects downhill. |
| mass | the amount of matter in an object. |
| weight | a measure of the force of gravity acting on an object |
| inertia | the tendency of an object to resist a change in motion |
| momentum | the product of an objects mass and velocity. |
| law of conservation of momentum | the rule that in the absence of outside forces the total momentum of objects that interact do not change. |
| free fall | the motion of a falling object when the only force acting on it is gravity. |
| satellite | any object that orbits around another object in space. |
| centripetal force | a force that causes an object to move in a circle. |