A rope of length L sits at rest on a horizontal table with length L/3 hanging over the edge. The rope is mass M. What is the normal force acting on the rope? (I keep having people tell me that it is the product of the mass of only the rope that is on the table with the acceleration due to gravity and I am having a problem with this.) This is not a homework question. It was part of a test question involving the rope that starts sliding of the table with friction involved as well.