A Bus Is Designed to Draw Its Power from a Rotating

question 29

Multiple Choice

A bus is designed to draw its power from a rotating flywheel that is brought up to its maximum speed (3000 rpm) by an electric motor.The flywheel is a solid cylinder of mass 250 kg and radius 0.500 m (I_cylinder = MR²/2) .If the bus requires an average power of 10.0 kW,how long will the flywheel rotate?

• A)154 s
• B)308 s
• C)463 s
• D)617 s

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