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Force is a strength or energy of physical action or movement. Force is measured in NEWTON.

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The rate at which an object is can move or operate. An example is how long it takes a vehicle to get to a certain point.

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Acceleration is a vehicle's capacity to gain speed over time. It is also the rate of change of velocity per unit.

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Motion is the action of moving or being moved. To be in motion, the whole object must be moving. If you are just waving your arm, you are not in motion.

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A reference point is a basis or standard for evaluation. A point could also be used to find or describe the location of something.

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When two forces acting in opposite directions and are equal in size, they are balanced forces. An object stays still or continues to move at the same speed and direction if there is a balanced force on it.

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The sum of all forces acting on an object is a net force. When you add up all the several forces that may be acting on an object, you get the net force.

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The distance traveled by an object divided by the duration of the object in an interval of time is the average speed of the object. Average speed is a rate.

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This kind of friction exists between a stationary object and the surface on which the object is resting on. When these objects start moving, kinetic force takes over.

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Kinetic friction is also know as sliding friction or moving friction. This kind of friction is the amount of

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Friction is the resistance that a surface and object encounter when they come into contact with one another. There is friction between our feet and the ground.