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Initial angular velocity of a circular disc of mass M is omega_(1). Then two small spheres of mass m are attached gently to two diametrically opposite points on the edge of the disc. What is the final angular velocity of the disc? |
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Answer» `((M+m)/(M))omega_(1)` Here `I_(1)=(1)/(2)MR^(2)andI_(2)=(1)/(2)(M+2m)R^(2)` `therefore (1)/(2)MR^(2).omega_(1)=(1)/(2)(M+2m)R^(2).omega_(2)` or `omega_(2)=((M)/(M+2m))omega_(1)` |
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