How Do You Derive the Equation of Motion for a Particle on a Conical Surface?

[sajid_mcse]

Homework Statement

A particle of mass m is constrained to move on the inner surface of a cone os semiangle alpha under the action of gravity. metion generalized co-ordinates and setup lagrangian and equation of motion.

Homework Equations

The Attempt at a Solution

 

[siddharth]

The rules of this forum require you to show some work before you get help. What have you attempted with this problem?