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# A small block of mass M moves on a frictionless surface of an inclined plane, as shown in figure. The angle of the incline suddenly changes from to at point B. The block is initially at rest at A. Assume that collisions between the block and the incline are totally inelastic (g = 10 ) The speed of the block at point B immediately after it strikes the second incline is :–

## The correct answer is:

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