A solid wood door 1.00 m wide and 2.00 m high is hinged along one side and has a total mass of 42.0kg . Initially open and at rest, the door is struck at its center by a handful of sticky mud with mass 0.400kg , traveling perpendicular to the door at 11.0m/s just before impact.
Find the final angular speed of the door.
2. Relevant equations
Conservation of angular momentum
3. The attempt at a solution
How do I determine the inertias for the mud and the door??