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strength or energy as an attribute of physical action or movement.coercion or compulsion, especially with the use or threat of violence. http://www.dictionary.com/

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the rate at which someone or something is able to move or operate. http://www.dictionary.com/

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a vehicle's capacity to gain speed within a short time.

"a Formula One car is superior to an Indy car in its acceleration" http://www.dictionary.com/

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the action or process of moving or being moved.

"the laws of planetary motion"a formal proposal put to a legislature or committee.

"the head of our commission made a motion that we rewrite the constitution" http://www.dictionary.com/

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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. http://www.dictionary.com/

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a basis or standard for evaluation, assessment, or comparison; a criterion. http://www.dictionary.com/

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Balance forces are two forces acting in opposite directions on an object, and equal in size. Anytime there is a balanced force on an abject, the object stays still or continues moving continues to move at the same speed and in the same direction. http://www.dictionary.com/

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There may be several forces acting on an object, and when you add up all of those forces, the result is what we call the net force acting on the object. http://www.dictionary.com/

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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. http://www.dictionary.com/

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Static friction is the friction that exists between a stationary object and the surface on which it's resting. A friction a force occurs when you try to push an object alongside a surface. http://www.dictionary.com/

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the resistance that one surface or object encounters when moving over another.the action of one surface or object rubbing against another. http://www.dictionary.com/