Question

While driving a nail into wood, the hammer is taken backward. give reason
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Answer 1

Answer:

To drive a nail into the piece of wood (which is work), he has to lift the iron hammer up, (this increases its potential energy because if its high position) and force it to move at great speed downwards (now has kinetic energy) to hit the nail

Answer 2

Answer:

To drive a nail into the piece of wood (which is work), he has to lift the iron hammer up, (this increases its potential energy because if its high position) and force it to move at great speed downwards (now has kinetic energy) to hit the nail.....