Induction motor equations question

[theone]

Homework Statement

I came across these two equations in a chapter on induction motors, and I was wondering if they both calculate the same thing?

$w_r=sw_s$
$w_r=w_s - \frac{p}{2}w$

Homework Equations

The Attempt at a Solution

s is the slip, $w_r$ and $w_s$ are the rotor and stator speed

 

[insightful]

By stator speed, I assume you mean the synchronous speed of the rotating field. I take slip to be:

s = 1-w_r/w_s.

and usually X100 for %slip.