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A mass M is a...

Question

A mass M is attached to a light inextensible string as shown in the figure. Tension in horizontal part of string is

A

\sqrt{3} M g

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B

\sqrt{2} M g

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C

\frac{M g}{\sqrt{3}}

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D

\frac{M g}{2}

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Solution

The correct option is A $\sqrt{3} M g$
$T_{1} c o s 30 = T_{h o r i z o n t a l}$
$T_{1} s i n 30 = m g$
( $T_{1} \to$ tension in the slant portion of wire)

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