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Bifilar Pendulum experiment

by infinit
Tags: bifilar, experiment, pendulum
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Apr8-04, 12:06 PM
P: 2
Could someone please give me an overview of how I get from measuring the time taken for x oscillations and the distance of the rod, to proving it moves with simple harmonic motion? I know i have to plot t--d^-1 on a graph, then using the gradient (td) i need to do some maths magic to get either an equation linking acceleration to velocity or displacement (to prove the motion is simple harmonic).

the setup is like this but i dont understand the rest of the experiment he has done...

thanks :)
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Apr10-04, 10:20 AM
P: 2
please... ?
Apr12-04, 10:38 AM
P: 117
I think you could try to compute the potential energy as a function of the angular displacement. You simply (...well, I didn't try it, I don't know how simple it is) have to find the height of the center of mass with a bit of trigonometry.

If the energy is quadratic in phi (or nearly quadratic for small phi), the motion is harmonic (anyone correct me if I'm wrong).

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