a toy is launched horizontally by a spring. once the toy is moving there is a total of 150 j of energy stored in the isolated system.

how much energy was stored in the system before the spring released the toy?


a. there is no way to tell what happens to the amount of energy in an isolated system unless we know the speed of the toy
b. 150 j, because the initial and final energy must be the same in an isolated system
c. less than 150 j because an isolated system loses energy as energy is converted from one form to another
d. more than 150 j because an isolated system gains energy as energy is converted from one form to another