Quote:
Originally Posted by FrankJ
In a frictionless physics lab I would expect the free speed between the field (carpet?) & hall wall (tiles of other hard surface?) to be the same.
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I wouldn't.
The compliant flooring (carpet) moves slightly as the mec rolls forward over it, due to the tranverse force component exerted by the roller. This motion is accompanied by roller rotation, which subtracts from forward motion somewhat.
That's the theory anyway. It would be enlightening to see a controlled test to investigate the magnitude of this effect quantitatively.