From 4475168e1dde7aa68a17a248e141275055236b42 Mon Sep 17 00:00:00 2001 From: eggy Date: Wed, 25 Nov 2020 11:10:32 -0500 Subject: [PATCH] phys: period is actually just T --- docs/sph3u7.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/docs/sph3u7.md b/docs/sph3u7.md index 9247e41..29b400e 100644 --- a/docs/sph3u7.md +++ b/docs/sph3u7.md @@ -560,7 +560,7 @@ Circular motion is any motion along a circular path. The instantaneous velocity **Angular displacement** ($\Delta \theta$) is the change in angle an object has rotated relative to a reference position. By convention, angular displacement anti-clockwise is positive. **Angular speed/velocity** ($\omega$) is the rate of angular displacement, and is expressed in radians per second. It is also known as angular frequency. -$$\omega=\frac{\Delta \theta}{\Delta t}=\frac{2\pi}{\Delta T}$$ +$$\omega=\frac{\Delta \theta}{\Delta t}=\frac{2\pi}{T}$$ An object in uniform circular motion has an angular speed of $2\pi f$. Since distance travelled in one period is the circumference of a circle, the **speed** of an object is: $$v=\omega r$$