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Howdy,
If you think in terms of how the tire deforms as IT pushes BACKWARD
ON THE ROAD you will see that, indeed, the static friction force
THE ROAD applies ON the TIRE is in the FORWARD DIRECTION.
Good Luck, > Herb Schulz (herbs@interaccess.com)
......
c. Friction from the road would be in the reverse direction
and could only decelerate the car (which we assume is already
initally stopped at the stop sign).
Herb Gottlieb from New York City
(Where cars do not always stop at stop signs when the police
are not around)