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A particle of mass m moving with velocity  vº  strikes a simple pendulum  of mass m and sticks  to it . The maximum   height attained  by the pendulum  will be

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Let us take that the pendulum is at rest initially and after the collision the velocity of the system is V . Now from the conservation of momentum we have , 

Initial Momentum = Final Momentum 

Now let us take that the block rises to maximum height h. 

So, P. E of the combination = K. E of the combination

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