Determine the minimum force P needed to push the tube E up the incline. The force acts par...

Determine the minimum force P needed to push the tube E up the incline. The force acts parallel to the plane, and the coefficients of static friction at the contacting surfaces are µA = 0.2, µB = 0.3, and µC = 0.4. The 100 kg roller and 40-kg tube each have a radius of 150 mm.