Two masses are connected by a cable, as shown in the figure for this question. M1 = 12 kg and M2 = 20 kg. M1 has a coefficient of friction of μ1 = 1.0 and M2 has a coefficient of friction of μ2 = 0.4. Determine the minimum value of P required to make masses M1 and M2 move. Ans. P = 115.7 N