Determine the horizontal force P required to cause slippage to occur. The friction coefficients for the three pairs of mating surfaces are indicated. The top block is free to move vertically. Assume m = 112 kg, m2 = 50 kg, m3 = 28 kg, = 0.58, M2 = 0.38, 3 = 0.28. m P m2 -1 -13 1123 Answer: P = i N