# Centroid of solid enclosed by surface z= y^2 , plane x=0 ,

1. Oct 31, 2016

### chetzread

1. The problem statement, all variables and given/known data
Find the centroid of solid enclosed by surface z= y^2 , plane x=0 , x = 1 and z =1 . The density is 1

2. Relevant equations

3. The attempt at a solution
Here's my working .

Centoird = mass of inertia / mass
So , i find the mass first .

It's clear that the circle is on zx plane ... I am not sure whether to use z= rcos theta or z = rsin theta . Can you help ?

#### Attached Files:

File size:
28.5 KB
Views:
32
• ###### IMG_20161031_233714.jpg
File size:
83.3 KB
Views:
29
2. Oct 31, 2016

### Staff: Mentor

Almost everything you have here is wrong.
• Your drawing is way off. Take more time and get a more careful drawing the represents the solid described in your problem statement.
• "the circle is on zx plane" -- No, it's not a circle.
• You are apparently trying to use polar coordinates -- why?

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted