The following scenario occurs on a happy planet where the strength of gravity is unknown: A 3.0 kg ball is launched straight up at 25 m/s from the floor onto a 2.0 m long 5.25X10^3 N/m compression spring that is fixed to the 12 m high ceiling. The maximum compression of the spring as it brings the ball to rest is found to be 0.50 m. Please determine the strength of gravity on the happy planet. Ignore all forms of friction and air resistance. Draw FBD and this is ap physics.