A tube has a total weight of 200 lb, length l = 8 ft, and radius =
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A tube has a total weight of 200 lb, length l = 8 ft, and radius = 0.75 ft. If it rests in sand for which the coeffcient 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 defined by p = p0 sinθ. For the solution it is necessary to determine p0, the peak pressure, in terms of the weight and tube dimensions.
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