Calculate the work that must be done to raise a object from Earth’s surface to an…

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

Calculate the work that must be done to raise a

1\,\text{kg}

object from Earth’s surface to an altitude of

100\,\text{km}

. (Take

G=6.67\times10^{-11}\,\text{N m}^2\text{kg}^{-2}

M_{\text{E}}=6.0\times10^{24}\,\text{kg}

and

R_{\text{E}}=6.4\times10^{6}\,\text{m}

.) (a)

-9.6\times10^{5}\,\text{J}

(b)

9.8\times10^{5}\,\text{J}

(c)

3.9\times10^{6}\,\text{J}

(d)

9.6\times10^{5}\,\text{J}