00:01
So for this problem, i want to consider a stubby half cylinder.
00:05
So let's start with the drawing.
00:08
This is the origin.
00:12
This is z, and this is x.
00:15
And our cylinder looks something like this.
00:20
It has depth, obviously, too.
00:23
So this is our half cylinder.
00:25
And we know that izz, so the moment of inertia about the z axis, is equal to one -half mr squared.
00:35
And this is helpful to know because we're trying to ultimately find, i'm in part a, the angular momentum, so this is l.
00:42
And we know the angular momentum is i -o -mega...