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the tendency of an object to resist changes in its velocity


A force that opposes motion, resulting from the contact of two surfaces

kinetic friction

Friction that opposes motion once the motion has already started.

static friction

Friction that opposes the initiation of motion

Newton's First Law

An object in motion (or at rest) will tend to stay in motion (or at rest) until it is acted upon by an outside force. Also known as Law of Inertia.

Newton's Second Law

When an object is acted on by one or more outside forces, the total force is equal to the mass of the object times the resulting acceleration. (total force = (mass) (acceleration)

Newton's Third Law

For every action, there is an equal and opposite reaction

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