Q.
The change in potential energy, when a body of mass m is raised to a height nR from the earth's surface is (R = Radius of earth)
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a
mgRnn−1
b
nmgR
c
mgRn2n2+1
d
mgRnn+1
answer is D.
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Detailed Solution
ΔU=mgh1+hR=mg nR1+nRR=nm gRn+1
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