| Term | Definition |
|---|
| force | a push or a pull |
| gravity | (physics) the force of attraction between all masses in the universe |
| mass | amount of matter an object contains |
| light | electromagnetic radiation that lies within the visible range |
| friction | a force that opposes the relative motion of two material whose surfaces are in contact with one another |
| Newton's First Law of Motion | Law of inertia, the state of motion of any object does not change as long as the net force acting upon the object is zero |
| Newton's Second Law of Motion | the net force acting on an object causes the object to accelrate in the dirction of the net force; F=ma (force=mass * acceleration) |
| Newton's 3rd Law of Motion | For every action force there is an equal reaction force |
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