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Physics-

General

Easy

Question

A block of mass $m subscript 1 end subscript$ rests on a rough horizontal plane relative to which the coefficient of friction is $mu.$ . A light string attached to the body passes over a light pulley and carries at its other end a mass $m subscript 2 end subscript$ and the system just begins to move. The value of $mu$ .

$\frac{m_{2}}{\sqrt{2} m_{1} - m_{2}}$
$\frac{m_{2}}{\sqrt{2} m_{1} + m_{2}}$
$\frac{m_{1}}{\sqrt{2} m_{2} + m_{1}}$
$\frac{m_{1}}{\sqrt{2} m_{2} - m_{1}}$

The correct answer is: $fraction numerator m subscript 2 end subscript over denominator square root of 2 m subscript 1 end subscript minus m subscript 2 end subscript end fraction$

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