Newton's third law: To every action, there is an equal and opposite reaction.

The action and reaction acts on different bodies at the same time and don't cancel each other.
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the third of newton states that : every action has an equal and opposite reaction.
when a body exerts a force on the 2nd object the 2nd object also exerts the force in equal amount as exerted by the 1st object but only in the opposite direction.
   i hope that this will help u............
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