1. The problem statement, all variables and given/known data Ok so using the standard equation v = Sqrt(T/Mu) I want to find Mu as a gradient for the first fundamental. I've made it into F x lambda = sqrt(T/Mu) Then f x 2l = sqrt(T/Mu) Then f= sqrt(T/4l^2 Mu) As I'm having the tension held by a mass suspended over a pulley. f= sqrt(mg/4l^2 Mu) Note: Mu is used to represent mass per unit length. T is TENSION MY QUESTION IS: How do I convert f^2= mg / (4l^2 Mu) into a form where I can get Mu as the gradient? Thanks.