1. The problem statement, all variables and given/known data I recently conducted an experiment to determine the moment of inertia of a disc using a tachometer attached to a disc marked with reflected strips, a weight, and an oscilloscope. The resulting oscilloscope data was plugged into fitplot to generate a graph of voltage (Y-axis) against time (X-axis). I am asked to convert the gradient of the graph to angular acceleration by using the equation ω=1.4V, where ω is the angular velocity and V is voltage. 2. Relevant equations ω=1.4V 3. The attempt at a solution I have no idea how to approach this. I know that the gradient of the graph is the change in voltage over the change in time, dV/dT , but I don't know how to proceed from here. Many thanks for any help.