# data[].attributes.body
an object at rest will remain at rest unless acted on by an unbalanced force. An object in motion continues in motion with the same speed and in the same direction unless acted on m=by an unbalanced force.

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acceleration is produced when a force acts on a mass. the greater the mass, the greater amount of force needed.

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This means that for every force there is a reaction force that is equal in size, but opposite in direction. That is to say that whenever an object pushes another object it gets pushed back in the opposite direction equally hard.

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

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the increase in speed or velocity.

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a vector quantity, and average velocity can be defined as the displacement divided by the time.

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a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force.

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the quantity of matter in a body regardless of its volume or of any forces acting on it.

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

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the action or process of being moved.

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the force that attracts a body toward the center of the earth, or toward any other physical body having mass. For most purposes Newton's laws of gravity apply, with minor modifications to take the general theory of relativity into account.