1. The problem statement, all variables and given/known data During a circus performance a 72 kg human cannonball is shot out of an 18m long cannon. If the human cannonball spends .95 s in the cannon, determine the average net force exerted on him in the barrel in the cannon. 2. Relevant equations f=ma x=v0t + 1/2 at^2 (?) 3. The attempt at a solution So i solved for acceleration using the kinematics equation, assuming that v0=0 i got approximately 40 m/s^2 and multiplied that by the mass of the man I got about 2900 N. Is this a good answer? Or did I confuse myself, as usual, when it comes to physics.