The mass of a star is 1.1e31 kg and its angular velocity is 1.40×10-7 rad/s. Find its new angular velocity if the diameter suddenly shrinks to 0.17 times its present size. Assume a uniform mass distribution before and after. [Icm for a solid sphere of uniform density is 2/5 mr^2].(adsbygoogle = window.adsbygoogle || []).push({});

i have to use I1w1=I2w2

it is (2/5)mr^2w1=(2/5)mr^2w2 and find out my w2

but i have all the data unless the r.

what i should put in r?...

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# Homework Help: New Angular Velocity

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