1. The problem statement, all variables and given/known data In 1453, during the siege of Constantinople, the Turks used a cannon capable of launching a stone cannonball with a mass of 5.40 x 10^2 kg. Suppose a soldier dropped a cannonball with this mass while trying to load it into the cannon. The cannonball rolled down a hill that made an angle of 30.0° with the horizontal. If 5.30 x 10^4 J of work was done by gravity on the cannonball as it rolled down a hill, how far did it roll? 2. Relevant equations 3. The attempt at a solution I know that you're looking for the distance traveled, obviously, but how do i get to that?! KE = 1/2 mv^2?