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A particle of mass M is projected from point P such that it grazes the surface of earth and escapes from earth's gravitational field. the total energy possessed by the particle at any instant is

$\frac{- G M m}{R e}$
$\frac{G M m}{R e}$
zero
none of these

A

\frac{G M m}{R e}

B

zero

C

none of these

D

\frac{- G M m}{R e}

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