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strength or energy as an attribute of physical action or movement.

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the rate at which someone or something is able to move or operate.

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increase in the rate or speed of something.

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he action or process of moving or being moved.

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a basis or standard for evaluation, assessment, or comparison; a criterion.

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Balance forces are two forces acting in opposite directions on an object, and equal in size.

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A net force is defined as the sum of all the forces acting on an object.

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The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval; the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero.

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Static friction is the friction that exists between a stationary object and the surface on which it's resting.

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Kinetic friction, also known as sliding friction or moving friction, is the amount of retarding force between two objects that are moving relative to each other.

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the resistance that one surface or object encounters when moving over another.