00:01
Question 15 would like you to find mx, mi, x, bar, y bar, the center of mass for the laminas of uniform density row bounded by the graphs of the equations y equals square root x, y equals 0, and x equals 4.
00:15
First, just graphing that to see that visually, you have square root x, then x equals 4 and y equals 0.
00:25
So this is our region.
00:26
Now using our formulas, we can start with mx, which is equal to row, going from 0 to 4, and you have square root x over 2 because g of x is 0 times just square root x dx.
00:51
From there, you can simplify that to row from 0 to 4, x over 2, dx.
01:02
Now just integrating, so you have row times x squared over 4 from 0 to 4, which is just 4 row.
01:12
Now finding mi, that would be row from 0 to 4 of x times square root x dx, which square root x is just x to the 1⁄2...