- #1
scorpius1782
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- 0
Homework Statement
A box with one corner at the origin and the opposite corner at (a,b,c). The density is:##\rho=\rho_o\frac{z^2}{c^2}##
Homework Equations
##r_{cm}=\frac{\int\vec{r}dm}{\int dm}##
The Attempt at a Solution
I calculated the mass:
##\int_{0,0,0}^{a,b,c}\rho_o\frac{z^2}{c^2}=\frac{abc\rho_o}{3}##
But I'm not sure what the top of the equation is suppose to mean. Am I suppose to multiply the density by the direction it is changing (z) then integrate? I can't find an example anywhere that explains it well enough so that I can understand.
Thanks for the help.