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Motion and Forces
Unit 1: Lesson 1-4
Term | Definition |
---|---|
position | describes the location of an object |
reference point | a location to which you compare other locations |
motion | a change in position over time |
speed | an object is a measure of how far something moves in a given amount of time |
vector | is a quantity that both size and direction |
velocity | speed in a specific direction |
acceleration | the rate at which velocity changes |
centripetal acceleration | acceleration in a circular motion |
force | simply a push or a pull |
net force | the combination of all the forces acting on an object |
inertia | the tendency in all object to resist a change in motion |
gravity | a force of attraction between objects due to their mass |
free fall | gravity is pulling it down and no other forces are acting on it |
orbit | when it travels around another object in space |