Question

A uniform bar of mass and length collides with a horizontal surface. Before collision, velocity of centre of mass was and no angular velocity. Just after collision, velocity of centre of mass of bar becomes in upward direction as shown. Angular velocity of the bar just after impact is:

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A

B

C

D

Hard
Solution
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Correct option is A)

Angular momentum will be conserved about point A just before and just after collision.



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