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JEEMAIN and NEET
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2011
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Q)
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 :
( A ) at the instant just before the body hits the earth
( B ) It remains constant all through
( C ) at the highest position of the body
( D ) at the instant just after the body is projected
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