1. The problem statement, all variables and given/known data A basketball with a mass of 0.56 kg drops from a height of 5 m and bounces off the floor back up to a maximum height of 4.3 m .Find the work done on the ball by the ground during the time the ball is in contact with it. 2. Relevant equations W = - Δ Ug Ug = mgh 3. The attempt at a solution ΔUg = mghƒ - mghι = 0.56*10*4.3 - 0.56*10*5 = - 3.92 J W= - Ug = 3.92 J Can somebody check my answer please ? Thanks for your help.