# Angular momentum problem

#### dk2421

A disk has a mass of 50 g and a radius of 3 cm. When it spins at 400 rev/s, what is its angular momentum?
I= (1/2)mr^2

$$\displaystyle L = I\omega = \frac{1}{2}mr^2 \cdot \omega$$
convert $$\displaystyle \omega$$ into rad/sec ... plug and chug.