00:02
Okay, we've got to find the centroid and center of gravity of this composite shape.
00:09
Since the density is all the same, it doesn't tell us that it's made of two different materials or anything like that, the centroid and the center of gravity will be the same.
00:22
And we can calculate them by finding the centroid of each of the three composite shapes.
00:29
So we've got a triangle, a rectangle, and a circular hole.
00:37
Okay, so let's start by finding the centroid of the triangle.
00:41
It's going to be one third along the base and then one third up the height.
00:49
So it'll be about there.
00:55
Now the base length was 300 millimeters, so this is going to be one third of that.
01:05
And the height was 200 millimeters, so i'll call that two hundred thirds.
01:12
So that's the coordinates of the centroid of the triangle.
01:19
And the area is going to be one half base times height, so one half 300 times 200 millimeters.
01:33
So it's going to be 30 ,000 square millimeters.
01:42
Okay, then the rectangle and circle, it's a little bit more straightforward.
01:49
You can see that they're going to share that centroid because the circle is lined up with the center of the rectangle and they show us all those dimensions.
02:06
Like this was 150 and this was 100...