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.

The system shown in figure is in equilibrium. Surface PQ of wedge A, h

1.	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.
Answer» Answer :`a = (G)/(SQRT2) ; N_(AB) = 0`