Quote:
Originally Posted by T^2
Rolling resistance has nothing to do with friction unless the wheels are slipping, which they aren't if the drivetrain is moving in a straight line. Rather, the losses are the result of deformation within the contacting surfaces.
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I think the point he was making is that in terms of modeling a system and seeing it's speed, rolling resistance can be lumped in with friction. A single friction term that covers all sources of "friction".
It's a fair point, and simple models are commonly done that way.
You are correct that rolling resistance isn't friction, but it shows up in the same way.