# Homework Help: Center of area for a square

1. May 10, 2006

### teng125

are there any formula to calculate center of area for a square which has length of 400mm and a quarter of circle is cut out at the corner of the square with radius=300mm ??

pls help.........thanx

2. May 10, 2006

### teng125

add in:the question ask for the coordinates of the center of area

3. May 10, 2006

### Staff: Mentor

You mean center of mass? If so, where would the center of mass of the circle part be just before it is cut out? (like if that quarter circle were still there)

4. May 10, 2006

### Curious3141

Treat the cut out portion as a "negative mass" and the full square (pre-cut) as an ordinary mass and use the usual method of summing moments in two axes.

EDIT : In fact, I've helped another poster work through a similar problem a long while back. For some reason the search function is not working properly, but try searching under my name for "center of mass" and you might be able to locate the post.

Last edited: May 10, 2006
5. May 10, 2006