Term Definition
motion an objects change in positon relative to a reference point
speed distance traveled divided by the time interval during which the motion occurred
velocity the speed of an object in a particular direction
acceleration the rate at which velocity changes over time; an object accelerates if its speed, direction
force a push or pull extend on the in order to change the motion of the object force has size and direction
newton the si unit or force
net force the combination of all of the forces acting on an object
friction a force that opposes motion between two foreces
gravity a force of attraction between objects that is due to their masses
weight a measure of gravity of the gradational force extorted on an object its value can change with location of the object in the universe
mass a measure of the amount of the matter of the mass

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