Attaching a wind turbine to an Automobile?

[CableCutter]

@fumster

Thanks, that was a great video. It really made it clear.

This one here is simpler and you can see the gears better, so it is even clearer:

ROLLING GEAR : PHYSICS QUIZ QUESTION

[Mangetout]

@CableCutter

This one here is simpler and you can see the gears better, so it is even clearer:

http://www.youtube.com/watch?v=dvyii6QBLtw

Indeed, although it’s not necessarily so clear that the gear moves faster than the rack driving it.

Anyway, does this help to resolve your questions?