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The kinetic energy needed to project a b...

The kinetic energy needed to project a body of mass `m` from the earth surface (radius R) to infinity is

A

mgR/2

B

2 mgR

C

mgR

D

mgR/4

Text Solution

Verified by Experts

The correct Answer is:
C
KE = `(1)/(2)mv_(e)^(2)=(GMm)/(R)=gRm`.
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