Quote:
Originally Posted by Mark T. DeNucci, Sr.
Coach Paul:
One cannot make the statement that: "It's impossible [for an object] to change directions without a momentary stop." Circular motion is an excellent example of an object changing direction without stopping.
MTD, Sr.
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I agree. It would be more accurate scientifically to say that an object cannot reverse direction without stopping. Stopping is only necessary in 1 dimension situations. Along each dimension, objects stop before changing direction even in circular motion (look at the horizontal and vertical components of circular motion). Of course, athletes move in 3 dimensions, so the statement that they can't change direction without stopping is incorrect.
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