1. The problem statement, all variables and given/known data On level ground, what is the maximum range (in m) of a cannon with muzzle speed 322 m/s? Please take a look at this: http://i995.photobucket.com/albums/af79/huybinhs/cannon2.gif 2. Relevant equations R = (V0^2 * sin2angles)/g 3. The attempt at a solution I think (not sure) the angles in the pic is 30 degree. And came up with the answer: R= 9162.55 m, and it is wrong. Please help with direction as well as formula and the final answer. Thanks so much!