A uniform bar has two small balls glued to its ends. The bar is 2m long and has mass 4kg, while the balls each have mass .5kg and can be treated as point masses. Find the moment of inertia of this combination about each of the following axes: (a) an axis perpendicular to the bar through its center; (b) an axis perpendicular to the bar though one of the balls; (c) an axis parallel to the bar through both balls; (d) an axis parallel to the bar and .5m from it.
The Attempt at a Solution
i tried the formula: (1/12)(ML^2) but that got the wrong answer and i assume because the balls at the end changed it. I am not sure what to do... any help would be very much appreciated