Simple pendulum with variable length

[Gaelou]

Hello, I need to model a simple pendulum with a variable length. I found a differential equation with two variables, does somebody know a method or an algorithm to resolve it ?



Thanks!

[Larz60+]

you should attempt your own version, but here's one implementation (which I can't vouch for, as I haven't tried it) to use as a guide: https://github.com/AliShug/numpy-pendulum