Originally Posted by
shdw
It would, if you continued to apply the same force constantly. You are discussing on pull of say 5 pounds. Well how bout you keep pulling with a constant 5 pound force. This would result in you constantly walking 90 degrees to the force ryan is applying to push the cart. The result would be a constantly changing direction otherwise known, a circle. Go test it and see.
If you are implying that two constant forces applied at right angles to each will form a circular path, then which direction does the circle form? To the left or right? Remember that the cart pusher is applying constant force as well.