ST3.10 Increasing Tension?
A heavy spring is attached to a wall. Two horses are harnessed to the other end and stretch it as far as they can; at this point the tension in the spring is
5000 N. The spring is detached from the wall and the horses reharnessed
so that one is attached to each end. Again the horses (assume them to be of
equal strength) stretch the spring as far as they can. In this stretched state is the tension