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Question

Physics Question on Gravitation

An artificial satellite moving in a circular orbit at a distance hh from the centre of the earth has a total energy E0E_0. Its potential energy is

A

−Eo-E_{o}

B

Eo E_{o}

C

−2Eo-2E_{o}

D

2Eo2E_{o}

Answer

2Eo2E_{o}

Explanation

Solution

Potential energy U=−GMmrU=\frac{-G M m}{r}
and Total energy E0=−GMm2rE_{0}=\frac{-G M m}{2 r}
Potential energy =2×=2 \times (Total energy)
=2E0=2 E_{0}