A cable is placed around three parallel pipes. Knowing that the coefficients of friction a...

A cable is placed around three parallel pipes. Knowing that the coefficients of friction are µs = 0.25 and µk = 0.20, determine (a) the smallest weight W for which equilibrium is maintained. (b) the largest weight W that can be raised if pipe B is slowly rotated counterclockwise while pipes A and C remain fixed.

Fig.P8.120