#### A body projected vertically from the earth reaches a height equal to earth's radius before returning to the earth. The power exerted by the gravitational force is greatest Option 1) at the highest position of the body Option 2) at the instant just before the body hits the earth Option 3) it remains constant all through Option 4) at the instant just after the body is projected

As discussed in

Power if the force is constant -

- wherein

Power exerted by a force P = F.v

The power exerted by the gravitational force is greatest and the instant just before the body hits the earth.

Option 1)

at the highest position of the body

This solution is incorrect

Option 2)

at the instant just before the body hits the earth

This solution is correct

Option 3)

it remains constant all through

This solution is incorrect

Option 4)

at the instant just after the body is projected

This solution is incorrect

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