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Physics, 01.08.2019 12:00 silviarahnama

You set out to design a car that uses the energy stored in a flywheel consisting of a uniform 80-kg cylinder of radius r that has a maximum angular speed of 430 rev/s. the flywheel must deliver an average of 2.00 kj of energy for each kilometer of distance. find the smallest value of r for which the car can travel 300 km without the flywheel needing to be recharged.

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