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Vocabulary 3.4A (oa)

Vocabulary 3.4A (oa) - Review Force & Motion

QuestionAnswer
Force A push or pull that changes the motion of an object.
Friction The force that two surfaces exert on each other when they rub against each other.
Gravity The force of attraction between all masses in the universe.
Mass A measure of the amount of matter in an object. Objects with greater amounts of matter need a greater force to stop, set in motion, or change acceleration.
Distance How far an object has moved.
Motion A change in position of an object.
Speed A rate that tells distance traveled per unit of time. s = d/t
Acceleration A change in the speed or direction of an object; the rate at which velocity changes. a = vf - vi / t
Newtons The unit of measurement for force. F=ma
Surface The outermost covering or layer.
Direction The path that a moving object follows.
Weight A measure of the force of gravity acting on an object.
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