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Science Ch. 15
Lesson 1: Forces, Motion, and Work
Term | Definition |
---|---|
acceleration | a change in velocity |
force | a push or pull on an object |
friction | a force that resists motion of one surface across another |
gravity | a force that causes objects to be pulled toward one another |
inertia | an objects resistance to a change in motion |
motion | a change in an object's position |
newton | unit of measurement for force 1 kg of mass 1 m/s sq. |
speed | how far an object moves in a given amount of time distance divided by time |
velocity | measure of an object's speed plus direction |
Newton's 1st Law | an object at rest will stay at rest and an object in motion will stay in motion unless acted on by an outside force |
Newton's 2nd Law | A relationship between force, mass and acceleration Force = mass x acceleration |
Newton's 3rd Law | for every action, there is an opposite and equal reaction |