I am trying to do a computer model of a triple pendulum.(adsbygoogle = window.adsbygoogle || []).push({});

I have looked up some of the models for single and double pendulum and successfully model them.

but when i start of triple pendulum, i encounter a really fundamental problem, i dont know how to write the system of equation for that.

i got the first equation to be (m1+m2+m3)[L1]^2 [x1]''+(m2+m3)([L1][L2][L3]) [x2]''+(m1+m2+m3)[L1]g [x1] ==0

but i feel that the first equation has already missing something. but i cant really tell because my mechanic class was taken long time ago and the book i have doesnt explain much about setting up the equation. it just basically told me that is the equation.

any help will be appreciated

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# Homework Help: Triple pendulum

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