1. The problem statement, all variables and given/known data I am given the equation (m1 – m2)g = (m1 + m2 + I/R2)a and the experiment is to validate this equation. 2. Relevant equations 3. The attempt at a solution After following the lab guide, it tells you to plot the weight difference (m1– m2)g against acceleration and determine the slope and y-intercept. If my graph is correct, than my equation is: y = 34.3x + 56.409 And from here we are asked to solve for I (moment of inertia of the pulley). It also tells us that the equation predicted a zero y-intercept, however a non-zero is expected. why? I have no idea what to do with the slope or y-intercept in this situation. I was hoping for the radius of the pulley, but that is not given to us, nor is the mass of the pulley. Please Help.