We also discussed how we would write this up if we were looking at an experiment involving movement. For example, what if we kept the mass the same but stretched the spring more each time, then timed how long it took to stop bouncing?
In this theoretical experiment, we are adding more EPE by stretching the spring more. This is transformed into EK. It stops bouncing because the EK is transformed into heat (and a little sound) by the force of friction.