Recent content by sede

I've found the places where I have gone wrong in this problem and what I needed to do. I'll post the solution for reference soon.

Homework Statement A double pendulum consists of two particles of equal mass m suspended by massless rods of equal length l. Assuming that all motion is in a vertical plane: 1. Find the Lagrangian of this system. 2. then find the equations of motion and, 3. linearize these equations...

I don't know how to sum the moments so I can't do this. I'm trying to understand what you mean here. Are you saying not to treat 'a' as a variable and therefore my approach or the monkey example would be correct?

I have a question with process when using D'Alembert/Virtual Work. I have the example question: A uniform plank of mass M is leaning against a smooth wall and makes an angle α with the smooth floor. The lower end of the plank is connected to the base of the wall with a massless inextensible...