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Re: whip crack explanation?

But how is it possible to measure the speed of such a small
object moving such a short distance in a fraction of a
second?
I doubt that it can be done with inexpensive phototimers or
by ordinary movie cameras.


No, not by ordinary cameras.
I had a parent who was into high speed photography,
He had and brought in (and did the photographing) with
the equipment. I only did it the one time as the family
moved, but it did work.

Tim