For example, if a spring is pulled on one end by 5N and 3N on the other end and has a spring constant of k=10 N/M, how much longer will the spring become?
My first thought was that the Tension in the sprint would be 3N and a net force of 2N accelerating the spring, and the spring would elongate by 0.3 meters. However I am unsure if this is right.
Also more generally, if a string on one end is pulled by a force of 5N on one end and 3N on the other, what is the tension of the string? Is the tension in the string constant throughout? And how would it change if the string is not massless?