Angular Momentum problem, Swinging door

1. The problem statement, all variables and given/known data

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??

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