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Motion Test
General Facts
Question | Answer |
---|---|
an object's change in position over time when compared with a reference point | motion |
the object that appears to stay the same | reference point |
the rate at which an object moves | speed |
speed depends on | distance and time |
average speed formula | total distance / total time |
the speed of an object in a particular direction | velocity |
the rate at which velocity changes; an object ___ if its speed and/or direction changes | acceleration |
velocity formula | speed + direction |
unit for acceleration | m/s/s + direction |
formula for acceleration | final velocity - starting velocity / time |
formula for momentum | mass x velocity |
unit for momentum | kg x m/s direction |
a push or pull on an object | force |
forces have ... | size and direction |
unit of force | newton |
used to measure force | spring scale |
force that results from combining all the forces exerted on an object | net force |