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crossfacer
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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
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. May anyone try it?
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