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Q.

Two pendulum bobs of mass m and 2m are attached to treads of length L suspended from a rigid support. Both the bobs are taken to a height H from the lowest point and then released so they collide elastically at the lowest point in their motion. Velocity of bob of mass m just after impact is 53ngH the value of n is ____ .

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answer is 2.

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Detailed Solution

m1=m,m2=2m; u1=2gH; u2=2gH

(but opposite in direction)

Apply V1,V2 formulas, we get V1=532gH

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Two pendulum bobs of mass m and 2m are attached to treads of length L suspended from a rigid support. Both the bobs are taken to a height H from the lowest point and then released so they collide elastically at the lowest point in their motion. Velocity of bob of mass m just after impact is 53ngH the value of n is ____ .