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01-22-2006, 10:54 PM
In answer to the most frequently asked question about the commercial:
The sequence where the tyres roll up a slope looks particularly impressive but is very simple. Steiner says that there is a weight [in each] tyre and when the tyre is knocked, the weight is displaced and in an attempt to rebalance itself, the tyre rolls up the slope.
This truly can happen (I'm not saying that it DEFINATELY happened in the commercial).
In my High School Physics class, we did something similar with internal weights, and causing an uphill roll. The roll is only good for about 1/3 the diameter of the tire, depending on the slope of the ramp. That is why there is a series of tires, rather than one tire going completely uphill.
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