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A rod is supported horizontally by means of two strings of equal length as shown in figure. If one of the string is cut. Then tension in other string at the same instant will:

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become equal to weight of the rod

increase

decreases

remain unaffected

answer is C.

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Detailed Solution

Before string is cut $T = \frac{M g}{2}$

Just after string is cut $M g \frac{L}{2} = \frac{M L^{2}}{3} α$

$α = \frac{3 g}{2 L}$

$M g - T = M (\frac{L}{2} α) = M (\frac{3 g}{4})$

$T = \frac{M g}{4}$

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