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Angle of Repose

28, A hollow ...

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28, A hollow sphere rolls down a rough inclined planewhose angle of inclination is θ, with horizontal. Forthe hollow sphere to undergo pure rolling, withoutslipping, the condition is \lbrack u coefficient of frictionbetween the hollow sphere and inclined plane\rbrack(1) tanθ < (2.5 μ) (2) tane> (2.5 μ)tane (3.5 H)(4) tane> (3.5 u)

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