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Physics-

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Question

A solid sphere of mass M and radius R is surrounded by a spherical shell of same mass M and radius 2R as shown. A small particle of mass m is released from rest from a height h (<<R) above the shell. There is a hole in the shell.What time will it take to move from A to B ?

$= \frac{R^{2}}{\sqrt{G M h}}$
$> \frac{R^{2}}{\sqrt{G M h}}$
$< \frac{R^{2}}{\sqrt{G M h}}$
None of these

The correct answer is: $less than fraction numerator R to the power of 2 end exponent over denominator square root of G M h end root end fraction$

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