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Principle of Superposition

In a hypothet...

Question

In a hypothetical uniform and spherical planet of mass $M$ and radius $R$ , a tunnel is dug radially from its surface to its centre as shown. The minimum energy required to carry a unit mass from its centre to the surface is $k m g R$ . Find value of $k$ . Acceleration due to gravity at the surface of the planet is $g$ .

A

0.7

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B

0.5

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C

1

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D

0.9

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Solution

The correct option is B 0.5

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