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Motion is a change in position over time.

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Position is the location of an object.

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Frame of reference is a group of objects from which you can measure a position or the motion.

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Speed is how fast an object's position changes over time.

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Velocity is the measurement that combines the both speed and the direction of a moving object.

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Acceleration is the change in velocity over time for an object.

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Momentum is the product of mass multiplied by velocity.

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Force is any push or pull from one object to another.

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Friction is a force that opposes the motion of one object moving past another.