# Finding center of Mass problem

• Mar 27th 2013, 02:20 PM
Giestforlife
Finding center of Mass problem
I'm asked to find the solution to the following statement:

Attachment 27715

So, the density function that I set up was as follows:
Attachment 27716

Then I set up my integrals so:

Attachment 27720

After I computed them, I got the following:
Attachment 27719
I don't understand what I did wrong, bu I'm still achingly close to the book's answer. Any help will be greatly appreciated.

--Giest
• Mar 27th 2013, 06:35 PM
chiro
Re: Finding center of Mass problem
Hey Giestforlife.

Hint: It wants the square distance from the y-axis which means it will x^2 since the perpendicular distance from the y-axis is the distance from the line x = 0. So your density function should be x^2 instead of y^2.

Try that and see how you go.
• Mar 28th 2013, 07:21 AM
Giestforlife
Re: Finding center of Mass problem
Quote:

Originally Posted by chiro
Hey Giestforlife.

Hint: It wants the square distance from the y-axis which means it will x^2 since the perpendicular distance from the y-axis is the distance from the line x = 0. So your density function should be x^2 instead of y^2.

Try that and see how you go.

Thanks! I figured it would be something minor like that, but my mind never went there.