A 5.1 g marble is fired vertically upwardusing a spring gun. The spring must be compressed 8.0 cm if themarble is to just reach a target 13 mabove the marble's position on the compressed spring.
a) What is the change in the gravitational potential energy of the marble-Earth system during the 13 m ascent?
b) What is the change in the elastic potential energy of thespring during its launch of the marble?
c) What is the spring constant of the spring?