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Ch 10 Vocab
| Term | Definition |
|---|---|
| force | a push or pull |
| newton | SI unit for magnitude, or strength, of a force |
| net force | combination of all forces acting on an object |
| unbalanced forces | causes the velocity of an object to change |
| balanced forces | equal forces acting on one object in opposite direction |
| friction | 2 surfaces exert pressure on each other |
| static friction | friction acts on objects not moving |
| sliding friction | solid surfaces slide over each other |
| rolling friction | object rolls across a surface |
| fluid friction | water, oil, or air |
| gravity | force that pulls objects toward each other |
| mass | measure amount of matter in an object |
| weight | gravitational force exerted on a person or object |
| free fall | force acting on an object gravity |
| air resistence | fluid friction on an object falling through the air |
| projectile | an object that is thrown |
| compression | elastic force that squeezes or pushes matter together |
| tension | elastic force that stretches or pulls matter |
| inertia | tendency of an object to resist a change in motion |
| momentum | characteristic of a moving object that depends on both the mass and the velocity of the object |
| law of conservation of momentum | in the absence of outside forces, the total momentum of objects that interact does not change |
| satellite | |
| centripetal force | |
| . |