1. The problem statement, all variables and given/known data The problem: A fishing boat weighing 147,150 N is towed by a much larger ship. The tow cable is linearly elastic and elongates 0.0278 m for each 1000 N of tension in it. The wave and viscous drag on the fishing boat can be assumed to be linearly proportional to its velocity, and equal to 55,000 N-s/m. At time t=0, the larger tow ship starts moving with constant velocity, V_o = 2 m/s. There is no initial slack in the cable. 2. Relevant equations Fing an expression for the fishing boat displacement, x, as a function of time. Plot the displacement of both boats on the same graph. 3. The attempt at a solution So I have: M=147150 B=55000 K=(1000/0.0278)=35971 N/m The diff-eq I found: Mx''+Bx'+Kx=k(V_o)t but when I try to solve the diff-eq, I have some non-real number, which doesn't seem right. What should I do? Thank you very much!