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## Homework Statement

A unifrom disc A of radius 2m is cut as shown in the image. The cut out is also a disc of radius 1m. Find the distance of the two center of gravity before and after the paper disc is cut.

http://crossfacer.com/circle.jpg [Broken]

## Homework Equations

x=m1x1/M+m2x2/M+......

## The Attempt at a Solution

Mass of the disc is proportional to its area.

so mass of disc A=2^2pi=4pi units

mass of disc being cut out=1^2pi=pi units

Let x be the distance between the two centers of gravity.

(4pi-pi)(2-x)=(4pi)(2)-(2+1)(pi)

x=0.333m

This question is quite difficult for me. I don't have much confidence on my answer.:tongue2: May anyone try it?

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