PDA

View Full Version : Lagrangian - a block sliding down a plane


028323250
Mar6-11, 04:22 AM
1. The problem statement, all variables and given/known data
A block having mass m slides down a fictionless inclined plane. The plane makes an angle α with the horizontal. Construct the Lagrangian and find the equation of motion.


2. Relevant equations



3. The attempt at a solution

L= 1/2 m v^2 - m g h

How do I get v?