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Force is a projectile that any object that once it is dropped continues in motion because of its own inertia and is influenced by only the downward force of gravity.

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Speed is a way of measuring how quickly something is moving, being done, or is something moving fast.

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Acceleration Is a change in the velocity of something or someone.

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Motion is a physical change or movement in a position or place.

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A reference point is a stationary object, and once it is found, the motion can be defined in different terms like speed.

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Balanced forces are two forces that are going in opposite directions on an object, and are equal in size.

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Net force is the overall force that is happening on an object.

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the total distance traveled divided by the total time elapsed.

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

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Kinetic Friction is also known as sliding friction and, is the amount of the retarding force between two objects that are in motion that are relative to each other.

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Friction is the resistance that one surface or object encounters when it starts moving over another.