1. The problem statement, all variables and given/known data Using energy conservation and assuming negligible air resistance, calculate the impact speed of a 4.00 kg cannon ball after being dropped from a height of 55.0 m. 2. Relevant equations KE sub total=KE sub 1+KE sub 2 speed=distance/time gravity=9.8 3. The attempt at a solution I'm completely lost as to how to get this with energy conservation. Can someone please help?