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  • Bhima was powerful enough to throw an elephant of mass m completely away from the earth. Assuming the mass of earth to be M and radius R, find the work done by the Bhima.<div class='qna-option'

Bhima was powerful enough to throw an elephant of mass m completely away from the earth. Assuming the mass of earth to be M and radius R, find the work done by the Bhima.

Option: 1

\mathrm{GM} / \mathrm{R}


Option: 2

\mathrm{gMm} / \mathrm{R}


Option: 3

\mathrm{mv}^2 / 2


Option: 4

\mathrm{GMm} / \mathrm{R}


Answers (1)

best_answer

Work done = (change of P.E.)

Initial energy of the mass = -\mathrm{GMm} / \mathrm{R}

Final energy of the mass = 0

Work done = 0-(-\mathrm{GMm} / \mathrm{R})=\mathrm{GMm} / \mathrm{R}

Hence, (D) is correct.

Posted by

avinash.dongre

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