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The gravitational force on the man and the gravitational force on the wall The n

ID: 2003618 • Letter: T

Question

       The gravitational force on the man and the gravitational force on the wall
       The normal force on the man from the wall and the force of friction on the man from the ground
       The normal force on the man from the ground and the force of friction on the man from the ground
       The normal force on the man from the wall and the normal force on the wall from the man
       None of the above

A man pushes against a wall. According to Newton’s third law, which two forces create an action-reaction pair?

Explanation / Answer

Newton’s third law: For every action there is an equal and opposite reaction.

Ans: The normal force on the man from the wall and the normal force on the wall from the man.

As the man is applying normal force on the wall and in return wall is applying normal force on man. Other action-reaction pair would be (i) The gravitational force on the man and  the normal force on the man from the ground; (ii) force of friction on the man from the ground and force of friction on the ground from the man

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