A 20-cm diameter circular object has a mass of 07 kg


A 20-cm diameter circular object has a mass of 0.7 kg distributed uniformly in a disc.

1. What is its rotational kinetic energy when it is operating at 3000 rpm?

2. What average power should be applied to bring the object from rest to its operating 3000rpm in 0.9 s?

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Physics: A 20-cm diameter circular object has a mass of 07 kg
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