A solid half-cylinder of radius 1 meters and length of 5 meters lies under 50 meters of water at the bottom of a lake. The cylinder is made of a material of constant density d. 1. Find the center of mass. I said that the COM will be in the center because there is a constant density. 2. What is the force exerted by the water on one of the lateral circular faces of the half cylinder? I'm having trouble understanding this part of the question. What exactly is a "lateral circular face?"