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A point mass m moving with velocity u towards the centre of the disc collides with a disc of mass m and radius r resting on a rough horizontal surface. Its collision is perfectly inelastic. Find angular velocity of system after pure rolling starts. A) 2u/7r B) 7u/2r C) 5u/2r D) 2u/5r

A point mass m moving with velocity u towards the centre of the disc collides with a disc of mass m and radius r resting on a rough horizontal surface. Its collision is perfectly inelastic. Find angular velocity of system after pure rolling starts.


A) 2u/7r      


B) 7u/2r   


C) 5u/2r   


D) 2u/5r

Grade:11

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