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>///the steered
> wheels (and the driven wheels too) providing a brute
> force sideward push, at the cost of scrubbing more
> or less rubber off the tread. /// A new
external force from the road appears; /// That
force would produce linear acceleration (slowing
down the center of mass). But it produces centripetal
acceleration instead; the center of mass keeps
turning at an essentially constant speed. How can
this be explained?///
Ludwik Kowalski