- #1

Pablo

- 16

- 2

## Homework Statement

Find moment of inertia of a washer with a hole of radius r/2.

## Homework Equations

Moment of inertia = integral of x^2 dm

γ = m / L

## The Attempt at a Solution

I think I can find the moment of inertia of the washer using integral of x^2 dm. So, I know my γ = m / L = m / (R/2) = 2m / R

I = (2m / R) * [((R/2)^3 / 3) - 0] = (m * R^2) / 12

However, that is not correct. Where am I going wrong?