00:01
Okay, so we've got a person jumping onto a carousel that's already been rotating with an initial angular velocity of 3 .04.
00:08
Got a rotational inertia of 124, radius of 1 .59, and the person jumps on with their mass of 47 point plots.
00:16
So the big idea behind this is that the initial angular momentum is equal to the final angular momentum before and after the quote -unquote collision between these two.
00:26
The initial angular momentum is going to be i rotational inertia times omega, and the final is going to be the same thing.
00:39
Times.
00:42
Okay, so the initial is 124, initial rotational inertia that was given in the problem, and the initial angular velocity was 3 .04.
00:53
The final rotational inertia is going to be, let me raise this.
01:00
Actually, the sum of the two.
01:03
So you're going to have the 124 from the carousel and then plus the rotational inertia for the person.
01:12
And then we're going to get a mega final here.
01:14
So let's actually do a separate calculation to find the rotational inertia for the person...