[sdiy] Screwing with Square Waves

[Gordon JC Pearce]

On Thu, Oct 31, 2013 at 10:04:21PM +0100, Ingo Debus wrote:
> 
> I still remember when I was in physics class, 16 years old, and couldn't get my head around angular velocity when there was just something oscillating and nothing was rotating at all...

Get a pair of metre sticks and turn your bike upside down.  Now with the tyre valve on your right, hold one horizontal in line with the wheel spindle and start measuring the height of the valve above or below the line as you spin the wheel.  You construct a sine wave and how fast you pedal is your angular velocity :-D

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Gordonjcp MM0YEQ