1. Mar 10, 2015

sun1234

• Member warned about posting with no effort shown
1. The problem statement, all variables and given/known data

Find the x-coordinate of the centroid of the region bounded by the graphs of
2. Relevant equations
y= 5/(√(25-x2))
3. The attempt at a solution
I stuck at finding Mx

Last edited by a moderator: Mar 10, 2015
2. Mar 10, 2015

haruspex

What you quote as a 'relevant equation' is part of the problem statement. A relevant equation here would be a general equation for finding a centroid.

3. Mar 10, 2015

sun1234

Here is what I got so far.

4. Mar 10, 2015

haruspex

In the OP you did not state the other boundaries, so I assume they are indeed x=0, y=0 and x=5.
You are only asked for the x coordinate. You found this, but called it MY.

5. Mar 10, 2015

sun1234

Thank you so much. How blind I am!

6. Mar 10, 2015

Ray Vickson

Last edited by a moderator: May 7, 2017
7. Mar 10, 2015

sun1234

That's My (not my in English). I already calculated, so don't bother about it. Thank you for trying to help. By the way, do you know where I can post quick questions? I have an integral that I can't figure out, but I don't want to make a new thread about it. Thank you.

8. Mar 10, 2015

Ray Vickson

For the record, what you wrote for My (by which you meant Mx) is NOT CORRECT. Mx = a ratio of two quantities, and what you called My is the numerator of the ratio, not the actual ratio itself.