1. The problem statement, all variables and given/known data I uploaded a figure demonstrating the problem w and i are constants and disc is horizontal. Disc mass is neglected. Vibrating mass only moves along the direction of springs -only horizontally at this position- http://[url=http://postimg.org/image/yxuleosq1/][ATTACH=full]199958[/ATTACH] [B]2. Relevant equations[/B] Lagrange equations D'alembert principle [B]3. The attempt at a solution[/B] Again, i uploaded my attempt at the solution. [ATTACH=full]199959[/ATTACH] I think i have a problem with d'alembert equation. Also i am confused about coriolis component of acceleration.