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A rotor wheel disk has a mass of 2.0 kg and is 30 cm in diameter....

A rotor wheel disk has a mass of 2.0 kg and is 30 cm in diameter. At the operating speed it rotates at a speed of 300 rpm. If only friction was applied from the brake pads at the edge of the disk, how much frictional force is need to stop the disk in 3.0 s?

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Answer #1

Frictional force is given by torque radius I 0.5MR2 2x0.32x0.5 -1.8x0.5 0.09 Wehave 2π 0-300x- 60 = 3 1.4rad/s 31.4rad/s 3s -

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