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[Phys-L] Re: Pendulum problem



That was quick.

Curious, since the torque is a cross product, and the rigid rod makes
the magnet a monopole, the effect is to simply add or subtract from the
g. [even w/o the small amplitude ~.]

bc, worried by the . instead of a *.

Brian Whatcott wrote:

At 09:37 PM 12/18/2004, you wrote:


Suppose the bob of a simple pendulum (all the assumptions, small
amplitude length of bob short compared to the rod's, etc.) is a PM
(collinear w/ the rod) immersed in a uniform field. How will the
resultant torque affect the pendulum?

I have an idea *, but I'm interested in other's.

If correct, quantitative.



I guess you believe the frequency goes with
1/(2pi*sqrt(L/(g+k.H)
for L length,
g gravitational constant
k arbitrarry constant
H field strength




bc

I'll deal w/ the variations later, e.g. ferromagnetic bob, di/converging
field, etc.




Brian Whatcott Altus OK Eureka!