A disc rolls on the inside of a fixed hollow circular cylinder whose axis is horizonatal, the plane of the disc being vertical and perpendicular to the axis of the cylinder; if, when in its lowest position, its centre is moving 8 g(a - b); show that the centre of the disc will describe an with a velocity angle o about the centre of the cylinder in time 3(a - b) ¹/2 28 log tan T O
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