[ODE] Odd Hinge-2 Behaviour?

[Martin C. Martin]

Thomas Harte wrote:
> 

> With all due respect, Newtonian physics '101' (American for introductory?) will simply tell me that every force has an equal and opposite reaction. Therefore, I see no reason why the chemicals being burnt inside my engine may not be turning some sort of cog attached to the wheels, causing the rotation of the wheels to be the reaction to that particular action, and yielding acceleration with no rotation effect on the chassis whatsoever.

A consequence of "Every action has an equal and opposite reaction" is the
conservation of angular momentum.  So, if the wheels of your car start
turning faster, then the chassis must start rotating in the opposite
direction.  Because the chassis has a much greater moment of inertia, it
will rotate much more slowly.  It will only make one rotation for every
[very large number] of rotations of the wheels.  But presumably that's
what you're observing.

- Martin