Two masses accelerate along a flat horizontal surface. They are connected by a rope. There is no friction between M_2 and the surface but friction between M1 is described by mu_k. the rope connecting M1 and M2 (M2 is right of M1) breats at a tension T_o. What is the maximum force F that can be applied to the system (pulling M2) that can be applied to the system without the rope breaking. This is what I did so far. I drew the free body diagrams for both. For M1, I have Normal force pointing up, graviyt down, friction to the left, and tension to the right. For M2, I have gravity down, normal force up, F to the right, and T to the left. For M1 x) T-f_k = (m1)*a y) N - M1*g = 0 For M2 x) F-T = M2*a y) N2- M2*g = 0 So I got T = m1a + f_k and F = T + M2 * a I plugged things in and got F = (M1 + M2)a + mu_k * N1 However, I know this is the wrong answer. I am suppose to express F in terms of T_o somehow. What am I suppose to do from here?