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    the rate of rotation of the collapsed star

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    A star rotates about its axis through a diameter once in 50 days. At the end of its life, the star collapses to one-hundreth of its original diameter. The rate of rotation of the collapsed star will be:

    a. 0.02 rotaions per day
    b. 20 rotaions per day
    c. 2 rotaions per day
    d. 200 roations per day

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    Solution Preview

    Answer: d. 200 rotations per day

    From conservation of angular momentum
    I1w 1 = I2w ...

    Solution Summary

    The solution calculates the rate of rotation of the collapsed star.