1. The problem statement, all variables and given/known data An 80-kilogram man jumps off a raft that weighs 100 kg. His initial velocity from jumping is 7 meters per second. Assuming that the friction resistance of the water is zero, the velocity of the raft after the man jumps will be? 2. Relevant equations Vf^2= Vi^2 + 2aD 3. The attempt at a solution I am trying to figure out the velocity of that raft after the man jumps, the question is confusing me on which variable I need to solve the problem. Any help?