>> If I put my car into top gear and set the engine to 3,500 revolutions
>> per minute, my car travels forward at almost exactly 75 miles per hour.
>> So... how far forward does it travel for a single revolution of the engine??
> 
> Is this a math puzzle, or a real question?
> 
> If it's a real question, it's almost impossible to answer from the information
> given.  You have to take into account acceleration, momentum, friction, etc.

How so?

The engine is directly coupled to the wheels. Unless the car looses 
traction, the forward motion of the car and the rotational speed of the 
wheels and engine all have a simple linear relationship.

-- 
http://blog.orphi.me.uk/
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