1 square = 100M free? A pulse is moving toward the end of a spring with a speed of 80 cm/s. It is not known whether the end is a fixed end or a free end. The diagrams below show the shape of the pulse at t = 0 s and at t = 1 8. Is the end of the spring a free end or a fixed end? plain. If there is not enough information, state so explicitly. please write in key board. Thank you