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Question

Two stones of masses m and 2m are whirled in horizontal circles. The heavier one is whirled in a circle of radius r2 and the lighter one in a circle of radius r. The tangential speed of lighter stone is n times that of the speed of heavier stone. If they experience the same centripetal forces, the value of n is

A
1
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B
2
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C
3
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D
4
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Solution

The correct option is B 2
Centripetal force is same on both as given.
So
m(nv2)2r=2mv22r2
n2=4
n=2

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