Bar hanging on 2 cords

  • Thread starter regisz90
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  • #1
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Homework Statement


A bar of lenght L is hanged by two cords(on the two edges of the bar) of lenght l in 1 pivot. What´s the frequency of small oscillations arond the stable position


Homework Equations


T=2[itex]\pi[/itex][itex]\sqrt{\Theta/mgd}[/itex]


The Attempt at a Solution


I would try to solve it as a physics pendulum, but im not sure that is it a physics pendulum, because its hanging on two cords, and before this there was always only 1 cord.
 

Answers and Replies

  • #2
rude man
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Displace the bar by a small amount and compute the restoring force f, making the usual small-angle assumption(s) for the angle θ between the vertical and a line drawn from the c.m. to the pivot. Then solve f(θ) = ma(θ) as usual.

BTW the problem should also have given the lengths of the two supporting cords, or the distance from the bar's center to the pivot point.
 

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