I am having a hard time with this problem: "A 9.00-kg hanging weight is connected by a string over a pulley to a 5.00-kg block that is sliding on a flat table. If the coefficient of kinetic friction is 0.200, find the tension in the string." I started the problem by drawing two free-body diagrams, one for the weight and one for the block. By doing that, I was able to come up with my components: Note: M1 = 5.00-kg M2 = 9.00-kg so when I am referring to "1," (such as Fx1) I am referring to the object with mass 5.00 kg. Fx1 = -f + T = m(ax) Fy1 = n - mg = 0 Fx2 = 0 Fy2 = T - mg = M(ay) From here, I realized that n = mg and f = u(n). We know what u is (0.200) and we know what n is, so I plugged those values in. f came out to be -9.8 N. From this point, I am stuck. I tried solving for T in the second y component equation, and just ended up with T = 88.2 + 9ay Any help on how to solve this problem is greatly appreciated. Thanks.