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Old 01-26-2010, 06:34 PM
UncleWilly UncleWilly is offline
 
Join Date: Oct 2009
Posts: 248
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I've seen pictures of those old pendulums. They predate high speed photography. The pendulum moved a very light weight indicator needle around a dial and when the pendulum fell back, the needle stayed at its maximum moved location. Pretty clever device. If everything was weighed and measured accurately, some standard physics equations would yield the velocity.
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