I need to know how different boundary conditions on the DE representing a string under a force can be physically implemented. For example, if you need y(0)= 0, just tie the string to y=0 at that end. If you need y'(0)=0, attatch it so that it can freely slide up and down a pole at x=0. But what if you need y'(0) = a, some constant? I was thinking you could put the pole at an angle, but then the string wouldn't always be attatched at x=0. How could you do it?