You have an awkwardly shaped object with an inertia of 1.5kg that has a tiny hook at one end. In order to balance it on your ?nger, you ?nd it will balance when your ?nger is 30cm from the end with the hook, along its longest axis. It is 50cm long along its longest axis. When you hang it by the hook and set it into simple harmonic motion, you ?nd that it makes 20 complete oscillations in 12 seconds. What is the moment of inertia of the object?