1. The problem statement, all variables and given/known data Determine the moment of inertia of a 19kg door that is 2.5m high and 1.1m wide and is hinged along long side. Ignore the thickness of the door 2. Relevant equations I=[tex]\int[/tex] (R^2 dm) 3. The attempt at a solution I really don't know where to start with this problem. My book only shows me how to do moments for cylindrically shaped objects and rods, so i don't know how to deal with 2d objects. I'm having particular trouble with coming up with a dm that is reliant on R.