A child is playing with a spring toy, first stretching and then compressing it.
[T-2, C–5, A-1]
a) List the energy transformations taking place during this activity.

SPH4U – Unit Test (Energy & Momentum)

5 | P a g e
b) Is the force applied by child constant or variable? Give reason for your answer.

c) Draw a graph showing variation of the restoring forces developed inside the
given spring when it is stretched or compressed.

d) How this force is related to the force applied by the child?