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I need help with the following problem.

A skater does a pirouette at the rate of 2.0 rev / second and then stop within 3/4 rev. Assume that the angular decceleration is constant and calculate its magnitude.

I tried to compute it but I found -18 rad/s^{2}.

BUt the textbook gives -17 rad/s^{2}.

Please can someone help me with this problem?

Thank you

B

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# Homework Help: Angular acceleration of a skater

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