I am having trouble to find the moment of inertia of the second rod!
Is it related to the first rod??
At the beginning I thought It's not!
But when took those as constant,the equation had become way much simpler and there is nothing about chaos!
My approach is given below
At First, I wasn't sure about it!
I was trying and thinking with some roughs!
And that's what made you confused. My final thought is this (F"+F'+F=qE).
Still don't know that my approach is correct or wrong!