(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A bead slides without friction on a circle in the shape of cycloid with equations x=a(B-sinB) and y=a(1+cosB) where 0<=B<=2pi.

Find the lagrangian.

2. Relevant equations

3. The attempt at a solution

I've tried to solve that problem by converting the positions x and y from cartesian coordinate to a new system of coordiantes defined by those equations. The problem is that am having many long calcucaltions. My new idea is to work it out in the polar coordinates. Am i going in the roght way?

**Physics Forums | Science Articles, Homework Help, Discussion**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: The lagrangian of a system

**Physics Forums | Science Articles, Homework Help, Discussion**