# Statics and Friction 02

1. Jul 1, 2009

### chrisyuen

1. The problem statement, all variables and given/known data

2. Relevant equations

Nil

3. The attempt at a solution

Why does the bar y have a factor of 0.5 for the forumla of area centroid?

Thank you very much!

2. Jul 1, 2009

### keen23

Am I right that the + is actually an devided by?

$$\bar{y}=\frac{1}{A} \int y\ dx dy = \frac{1}{A} \int 0.5\ y^2\ dx$$

Is that ok?

3. Jul 1, 2009

### cepheid

Staff Emeritus
Those are not plus signs. They are in fact, this symbol here:

$$\div$$ ​

So you are right.