I have this assignment where I am supposed to list all the forces acting on someone who is swimming in a standered olyimpic sized pool. The obvious force to me was the mass of the swimmer acting downwards and presuming the guy was swimming forward there would be a drag force acting backwards. Also as he is swimming, there will be the force of the water pushing his hands forward. (Action reaction force). This is al the forces I can think of...is there anymore? and am I correct so far?