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A fan generates power with 4 blades with a diameter of 200m m, run well when...

A fan generates power with 4 blades with a diameter of 200m

m, run well when the outer end of a blade is moving at around 20 m/s.

a. The fan is allowed to begin spinning from rest up to its top safety speed

over the course of 140 seconds. what is the angular

acceleration of the blades

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