1. The problem statement, all variables and given/known data a= 0.3 m / s2 k = 10 000 N / m m = 1800 kg ( of the car that is being pulled) Ignore friction. A car is being pulled by another car by a rope ( stiffness = 10 000 N/m) with acceleration of 0.3 m/s2.. Find the change in length of the rope. 2. Relevant equations F = ma F = kx (x is the change in length) 3. The attempt at a solution x = F / k I am having trouble at finding F. I have made a graph, which I have uploaded here, of the car that is being pulled in this situation and I don't know if it's correct. A hint would be appreciated.