1. The problem statement, all variables and given/known data You are in charge of a cannon that exerts a force 11200 N on a cannon ball while the ball is in the barrel of the cannon. The length of the cannon barrel is 2.18 m and the cannon is aimed at a 37.9 ◦ angle from the ground. The acceleration of gravity is 9.8 m/s 2 . If you want the ball to leave the cannon with speed v0 = 78.4 m/s, what mass cannon ball must you use? Answer in units of kg. 2. Relevant equations KE=(1/2)mv^2 W=F*displacement*cos(theta) 3. The attempt at a solution Used the kinetic energy equation to solve for mass Then, used the second equation to find work. I do not know how to get work to kinetic energy to plug into the mass solved equation.