<P> Recently , an additional , purely geometrical factor was recognized : the tip of the whip moves twice as fast at the loop of the whip , just like the top of a car 's wheel moves twice as fast as the car itself . </P>
<P> Recently , an additional , purely geometrical factor was recognized : the tip of the whip moves twice as fast at the loop of the whip , just like the top of a car 's wheel moves twice as fast as the car itself . </P>
how fast is the tip of a whip
how fast is the tip of a whip
twice as fast at the loop of the whip
twice as fast at the loop of the whip