1. The problem statement, all variables and given/known data There is a m1 = m mass and 2 rods with mass m as drowed on the file below. The speed of the system immediately after F impact is being asked. ("http://www.bordova.com/Lagranges_equations_for_impulsive_forces.pdf" [Broken]) or doc version ("http://www.bordova.com/Lagranges_equations_for_impulsive_forces.doc" [Broken]) 2. Relevant equations Included in the doc file. 3. The attempt at a solution I have tried to solve the problem by myself and my solution is also included in the file above. I have found a strange result. If you see and say any mistakes of my solution I will be glad.