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Motion Vocab Quiz
Vocab
Question | Answer |
---|---|
an object's change in position over time when compared with a reference point | motion |
the speed of an object in a particular direction | velocity |
the rate at which an object moves; depends on the distance traveled and the time taken to travel that distance | speed |
the rate at which velocity changes; occurs if speed and/or direction change | acceleration |
a push or pull that has size and direction | force |
the SI unit of force | newton |
a measure of the gravitational force exerted on an object, usually by the Earth | weight |
the amount of matter that something is made of | mass |
a force of attraction between objects that is due to their masses | gravity |
a force that opposes motion between two surfaces that are touching | friction |
the force that results from combining all the forces exerted on an object | net force |