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A flat disc of radius R lies on the horizontal surface The pressure between the...

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A flat disc of radius R lies on the horizontal surface The pressure between the disc and the surface decreases linearly with distance from the centre r due to its weight per unit area from 2Po at the centre to Po at r R at the circumference The coefficient of friction between the disc and the surface is u Find the power delivered by the external agent to rotate the disc with a constant angular velocity 5 A PR 6 3 B 7 PR 6 11 mp3 A 108 the pe

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