1. The problem statement, all variables and given/known data 2. Relevant equations F=ma to find the respective accelerations of the man and the barrel. The suvat equations. 3. The attempt at a solution I tried making 2 equations to solve them simultaneously but the values I'm looking to find always cancel out. I know that s and t will be the same for the barrel and the man when the bottom of the barrel is level with the man's head. But how do I find either s or t?