# Moment of mass

## Homework Statement

Guys l would like a clarification on the formulas for calculating the moment of mass.

## The Attempt at a Solution

For vertical strips :

$$M(y-axis)=\int_a^bx\rho[f(x)-g(x)] dx$$

$$M(x-axis)=\frac{1}{2}\rho\int_a^b[f(x)+g(x)][f(x)-g(x)]dx$$

For Horizontal strips :

$$M(y-axis)=\frac{1}{2}\rho\int_a^b[f(y)+g(y)][f(y)-g(y)]dy$$

$$M(x-axis)=\int_a^bx\rho[f(y)-g(y)]dy$$

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