What is its rotational kinetic energy

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Reference no: EM13279978

A 30-cm diameter circular saw blade has a mass of 0.9 kg distributed uniformly in a disc.

(a) What is its rotational kinetic energy when it is operating at 4000 rpm?

(b) What average power must be applied to bring the blade from rest to its operating 4000 rpm in 0.8 s?

Reference no: EM13279978

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