00:01
All right, we're going to calculate some moments of inertia here.
00:05
So, mass is 2 .5 kilograms.
00:13
Length is 0 .750 meters, and this is a rod passing through the end and the center.
00:27
So through the end, it would be one -third ml -squared.
00:43
Through the center would be 1 -12th, i think, ml -squared.
00:56
And what was the third one? parallel to the rod passing through it.
01:07
So i think directly through the center of the rod, parallel to the rod, well, it would be zero or very close to zero for that.
01:34
We'd have to know the density of the rod, and maybe we could figure out the radius, but it'll be very small.
01:44
Okay, so m equals 2 .5, l equals 0 .75, 1 3rd ml squared.
02:04
4 .69 kilogram meter squared.
02:16
1 .117.
02:20
Okay, let's move one to b.
02:25
A 3 kilogram sphere with a diameter.
02:38
I don't want diameter.
02:39
I'm gonna do radius.
02:41
38 divided by 2 is 19 centimeters, which would be 0 .190 meters...