A ball with a mass of #140 g# is projected vertically by a spring loaded contraption. The spring in the contraption has a spring constant of #21 (kg)/s^2# and was compressed by #3/8 m# when the ball was released. How high will the ball go?
Potential stored in spring
Kinetic energy gained by ball
According to law of conservation of energy
Potential energy in spring = Kinetic energy gained by ball