Recent content by syndrome

Up.. please :confused:

I have this mass-spring-ball system: https://dl.dropbox.com/u/1723401/massa-molla/sistema.png There is friction, but the ball only rolls. I have to find the model of the system. I started to divide the 2 systems and for mass1 I found the follow equation: m_1 \cdot \ddot{x_1} = F_k...