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A uniform bar of mass M and length L collides with a horizontal surface. Before collision, velocity of centre of mass was v0 and no angular velocity. Just after collision, velocity of centre of mass of bar becomes v in upward direction as shown. Angular velocity ω of the bar just after impact is:
- 3(v0+v)cosθ2L
- 6(v0−v)cosθL
- (v0−v)cosθ6L
- (v0+v)cosθL
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Angular momentum will be conserved about point A just before and just after collision.
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