pic: Omni Design Trial

[MrForbes]

Originally Posted by Fred Sayre

Wait, so when you are rolling forward and there is a sideways force, where is that force coming from? It is the motors. You don't get the applied force for free.

You can get an applied force for free, but you can't get that force applied through a distance for free....then it would be work. Sideways force with no sideways velocity = no energy expended, and no work done, in that direction.

At least that's my understanding of physics. I could be wrong.

edit--think about walking...where's the force? where's the work getting done? where's the velocity?