A toy gun launches a small plastic sphere using a spring. The spring has a spring constanct of 20 J/M^2 and the plastic sphere has a mass of 25 grams.

Question

Before launch
x initial is -10cm
velocity initial is 0 m/s

After launch
x final is o cm
In order to determine the speed of the sphere just as it leaves the toy gun, I first need to identify the forms of energy relevant to the problem. What are the forms of energy I need to list?