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When we walk on a boat in still water, the boat will ______

(a) Move ahead

(b) Move backwards

(c) Not move

(d) Move sideways

I have been asked this question at a job interview.

This is a very interesting question from Laws of Motion Basics topic in section Laws of Motion of Physics – Class 11

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The correct choice is (b) Move backwards

Explanation: The third law of motion applies in this case. According to the third law of motion, for every action, there is an equal and opposite reaction. When we walk on the boat, the boat experiences an equal and opposite reaction force. Since very little resistance is offered by the still water, the boat will move backwards.

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