A tube has a total weight of 200 lb, length = 8 ft, and radius =

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A tube has a total weight of 200 lb, length ∫ = 8 ft, and radius = 0.75 ft. If it rests in sand for which the coefcient of static friction is μs = 0.23, determine the torque M needed to turn it. Assume that the pressure distribution along the length of the tube is dened by p = p0 sin θ. For the solution it is necessary to determine p0, the peak pressure, in terms of the weight and tube dimensions.

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