A spinning top has a moment of inertia of 200 g cm^2. When it is rotated at 50 revolutions per second, it remains upright for 30 seconds. We admit that it only falls when its angular speed is negligible. Calculate the moment of the braking torque exerted on it, and the number of revolutions it makes from the initial situation until it stops.
A spinning top has a moment of inertia of 200 g cm^2. When it is rotated at 50 revolutions per second, it remains upright for 30 seconds. We admit that it only falls when its angular speed is negligible. Calculate the moment of the braking torque exerted on it, and the number of revolutions it makes from the initial situation until it stops.
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Transcribed Image Text:A spinning top has a moment of inertia of 200 g cm^2. When it is rotated at 50 revolutions per
second, it remains upright for 30 seconds. We admit that it only falls when its angular speed is
negligible. Calculate the moment of the braking torque exerted on it, and the number of
revolutions it makes from the initial situation until it stops.
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