A baseball of mass .025kg is released at rest from a location 3.5m above the ground. You will calculate its speed at the instant it hits the ground. Choose a sysem to analyze, and list the objects in your system. I chose the baseball and the earth as the system Write out the energy principle as it applies to the system you have chosen. Solve for the speed of the baseball when it hits the ground Here's where I'm lost. The baseball has kinetic energy (1/2mv^2), and the earth is pulling down on it (-9.8*m), but I'm not sure how to arrive at the answer. According to the key, the answer is 8.3m/s.