A thin rod of mass 0.9kg length 1m is suspended at rest from one end so that it can from y oscillate in the vertical plane. A particle of mass 0.5kg moves in a st. line with a velocity 80m/s hits the rod at its bottom most point & sticks to it. The angular speed in rad/sec of it immediately after the collision will be .....
Option: 1 20
Option: 2 10
Option: 3 30
Option: 4 40

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