A discus thrower accelerates a discus from rest to a speed, Ask an Expert

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A discus thrower accelerates a discus from rest to a speed of 24.9 m/s by whirling it through 1.22 rev. Assume the discus moves on the arc of a circle 1.01 m in radius.

(a) Calculate the final angular speed of the discus.

(b) Determine the magnitude of the angular acceleration of the discus, assuming it to be constant.

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