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Physics-

General

Easy

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. With what approximate speed will it collide at B ?

$\sqrt{\frac{2 G M}{R}}$
$\sqrt{\frac{G M}{2 R}}$
$\sqrt{\frac{3 G M}{2 R}}$
$\sqrt{\frac{G M}{R}}$

The correct answer is: $square root of fraction numerator G M over denominator R end fraction end root$

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