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Law of inertia - body at rest

ex: the ball is at rest
(unless it acted upon by an unbalanced force)

Law of acceleration - the acceleration of body is directly proportional to the force applied and inversely proportional to the mass of the body.

ex: you exert a force on a ball as a result the ball moves.

Law of interaction: for every action, there is equal but opposite reaction.

ex: it takes a less force to move a soccer ball than a pin ball.
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