1. The problem statement, all variables and given/known data So I know that a cannon weighs 2220 kg and a cannon ball weighs 19.5 kg and that when you fire the cannon at 102 m/s the speed of the cannon is .895m/s in the opposite direction. part B of the problem asks how much faster would the ball travel is the cannon was mounted rigidly disregarding friction. 2. Relevant equations mv1 = mv2 3. The attempt at a solution I did 2220(x)= (19.5)(102) to find the speed of the cannon in part A so for part B i did 2220(0) = (19.5)(x) but im not sure if 19.5 m/s is correct.