Hi, I need to know where I can find information on the web so as to analytically solve the system on the attached jpg where: m1, m2 are the values of each mass v1, v2 are the speeds of each mass K1, K2 are the stiffness coefficient of each spring L1, L2 are the lenghts of each spring. I am assuming a 1D motion. The system is a VERY simplified model of a head-on collision between two automobiles. I am an engineer from Argentina and I need to analyze for a given time (t) the values of v1 and v2, and the values of L1 and L2. I would greatly appreciate any kind of help you can give me. I wish you a very good year.