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The system shown in figure is in equilib...

The system shown in figure is in equilibrium. Surface PQ of wedge A, having mass M, is horizontal. Block B, having mass 2M, rests on wedge A and is supported by a vertical spring. The spring balance S is showing a reading of `sqrt2` Mg. There is no friction anywhere and the thread QS is parallel to the incline surface. The thread QS is cut. Find the acceleration of A and the normal contact force between A and B immediately after the thread is cut.

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The correct Answer is:
`a = (g)/(sqrt2) ; N_(AB) = 0`
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