Nail exerts force on a magnet?

Classical Mechanics Level 1

A nail is placed near a magnet and the magnet pulls it with a force "F". What is the force exerted by the nail on the magnet is F=25 N ?

Details And Assumptions

Enter your answer as a number without the units E.g. If your answer is 50 N enter your answer as 50

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The answer is 25.

Mehul Arora by Mehul Arora , 20, India

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3 solutions

Krishna Karthik
Nov 21, 2018

Take Newton's 3rd law into account and you will get the answer.

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Mishit Shah Shah
Jan 4, 2015

both has equal force of attraction

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Mehul Arora
Dec 31, 2014

According to Newton's Third law of motion, Every action has an equal and opposite reaction. Hence if 25 N is exerted by the magnet on the nail therefore the nail also exerts 25 N on the magnet.

As for why the magnet doesn't move on exertion of force by the magnet, It does not move because the magnet has a much greater mass than that of the Nail.

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