a spring with k=128 Nm is compressed to a distance 2.0 pastequillibrium and is used to project a ball with mass = 4 kgdirectly up. Neglect air resistance.
A) What is potential energy of the spring in its compressedposition.
J
B) What is the maximum height above its initial restingposition.
m
C) What is muzzle velocity when the spring reaches equillibrium.