1. The problem statement, all variables and given/known data A student throws 0.22kg rock horizontally at 20.0m/s from 10.0m above the ground. Ignore air resistance. Find the initial kinetic energy of the rock 2. Relevant equations Ek = mv^2/2 3. The attempt at a solution This sounds INCREDIBLY easy and every shape or form Simplying plugging in what I know Ek =(0.22)(20.0)^2/2 Get's me the answer of 9.68 However APPARENTLY that's the wrong answer The answer that I'm given is 44J How is this possible? I must have gone completly off track somewhere.