posted by sunny on .
A 5.0 gm marble is fired vertically upward using a spring gun. The spring must be compressed 8 cm if the marble is to just reach a target 20 m above 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 20m ascent.
(b) What is the change in the elastic potential energy of the spring during its launch of the marble
(a) Eu = m*g*h = 0.005*9.8*20
(b) Eu = Ek