# Speed

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

Speed, abbreviated as s, is the rate of change or distance with time.  Speed is a scalar quantity having no direction.  Speed is not velocity, they do not mean the same thing.

## Speed formulas

 $$\large{ s = \frac{ d }{ t } }$$ $$\large{ s = \frac{ 5252\; HP }{ \tau } }$$ (engine horsepower)

### Where:

$$\large{ s }$$ = speed

$$\large{ d }$$ = distance

$$\large{ HP }$$ = horsepower

$$\large{ t }$$ = time

$$\large{ \tau }$$  (Greek symbol tau) = torque

Tags: Equations for Speed