# Newton's Second Law for Rotation

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

## Newton's Second Law for Rotation formula

$$\large{ \tau = I \; \alpha }$$
Symbol English Metric
$$\large{ \tau }$$  (Greek symbol tau) = rotational force $$\large{lbf}$$ $$\large{N}$$
$$\large{ \alpha }$$  (Greek symbol alpha) = angular acceleration $$\large{\frac{deg}{sec^2}}$$ $$\large{\frac{rad}{s^2}}$$
$$\large{ I }$$ = moment of inertia $$\large{ in^4 }$$ $$\large{mm^4}$$

Tags: Force Equations Laws