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  4. For equilibrium, value of θ is

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Q. For equilibrium, value of $\theta$ isPhysics Question Image

Laws of Motion

Solution:

Let T be the tension in each string supporting $\sqrt{2} \, m$, then T cos $\theta$ + T cos $\theta = \sqrt{2}$ mg i.e. 2 T cos $\theta$ = $\sqrt{2}$ mg But T = mg also $\therefore $ 2 mg cos $\theta = \sqrt{2} $ mg i.e. cos $\theta = \frac{1}{\sqrt{2}}$ i.e. $\theta$ 45$^\circ$

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