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Physics Review

Vocabulary for Science

QuestionAnswer
velocity an object's speed with direction
motion a change of position
speed distance divided by time it took for motion to occur (= distance/time)
energy the ability to do work
acceleration change in velocity (speed or direction or both)
force force or a pull; the cause of a change in motion
net force the sum (+) or difference (-) of all the forces acting on an object
unbalanced force combined forces create a net force greater than zero (object moves)
balanced force combined forces createa net force of zero (object does not move)
friction a force that resists the movement of an object
inertia an object's resistance to a change in motion
work force x distance how much force does it take to move an object?
gravity the force of attraction between any two objects
kinetic energy energy of a moving object
potential energy stored energy (object is not moving)
Created by: mharlan