Double Pendulum URGENT! 1. The problem statement, all variables and given/known data I am trying to solve this past paper question for my exam tomorrow: A double pendulum is constructed using a light rod and light inextensible strings. Two string pendulums hanging from ceiling 1m long. 0.1m from top they are connected by a light rod. One mass is knocked to the right. Find the beat period in the subsequent motion. 2. Relevant equations I know that they will both undergo shm a=-w^2x but I have no idea where to go from here!!!!