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A body projected electrically from the e...

A body projected electrically from the earth reaches a height equal to earth's radius before retruning to the earth. The power exerted by the gravitational force is greatest

A

at the highest position of the body

B

at the instant just before the body hits the earth

C

it remains constant all through

D

at the instant just after the body is projected

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The correct Answer is:
B
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