Equation of motion for MDOF system

[Ikidnapu]

Homework Statement

Anyone know how to write a equation of motion for a mdof system like this:

http://img100.imageshack.us/img100/1678/mdofsystem.jpg

If u could explain step by step how to do it, would be great.

Thnaks

 

[TheJCBand]

Start by defining a coordinate for each degree of freedom. Then draw the free body diagram for each of the masses. Then, write Newton's second law for each of those masses. That should get you started.

 

[Ikidnapu]

thanks managed to create something, hope it's right.