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Author Topic: Pendulum  (Read 2442 times)
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Steve West
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« on: February 05, 2014, 11:01:18 PM »

Hi,
Am i right in thinking that a pendulums working length is from its
pivot to its center of mass, rather than pivot to end.
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ArtF
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« Reply #1 on: February 06, 2014, 07:47:09 AM »

Steve:

  Yes, its actually f5rom center of mass, which means the rod and all is considere d but since thats so complex, most pendulums
allow for motion of the bob up or down the shaft to find the sweet point.

Art
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Luke Jones
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« Reply #2 on: April 04, 2014, 11:51:22 PM »

I feel pretty ignorant asking this question, but why does a pendulum with a 1 second period and an escapemen t with 60 teeth result in the escapemen t taking 1 minute and 1 second to make a full turn?  Shouldn't it take 1 minute flat?
Thanks a heap!
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ArtF
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« Reply #3 on: April 05, 2014, 07:27:03 AM »

Luke:

   Its a rounding of the data, the pendulum length vs gravity formula that gives you the 1 second
creates a pendulum thats length is about 10 decimal places after the zero, when rounded to 2 decimals,
(or 4) its probably rounding upwards making the pendulum longer thus increasin g the period slightly.
Just a small change in length makes quite a differenc e.. Smiley

Art
 
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Monafly
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« Reply #4 on: April 07, 2014, 07:25:18 PM »

Friction?
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