1. The problem statement, all variables and given/known data After falling from rest from a height of 34 m, a 0.47 kg ball rebounds upward, reaching a height of 24 m. If the contact between ball and ground lasted 1.8 ms, what average force was exerted on the ball? 2. Relevant equations vf^2=2gh vf=sqrt 2gh. force*time=2sqrt(2gh) 3. The attempt at a solution i have tried to plug in but i cannot seem to get it correct. help please!