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  • A shell of mass and radius <img alt="\mathrm{R}" src="https://entrancecorner.oncodecogs.com/gif.

A shell of mass \mathrm{M} and radius \mathrm{R} has a point mass m placed at a distance \mathrm{r} from its centre. The gravitational potential energy \mathrm{U(r) \: vs \: r } will be.

Option: 1


Option: 2


Option: 3


Option: 4


Answers (1)

best_answer

\mathrm{U(r)=\left\{\begin{array}{c} -\frac{G M m}{r}, r \geq R \\ -\frac{4 G \mathrm{Gm}}{R}, r<R \end{array}\right.}

Hence option 3 is correct.

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