Coupled physical pendulums (URGENT) Imagine that you have coupled physical pendulums like this (see image below). mass is in the inferior part of the pendulum.* Now we let the right pendulum swing without initial speed = 0 with a certain amplitude. As we know, the amplitude of the right pendulum will decrease , increasing the amplitude of left pendulum. I have the Period for the max amplitude of the right pendulum. When the amplitude of the right pendulum is zero, i have to mark the max amplitude of the left pendulum. You can see in the following image: L it's approximated 1 meter. d its caused by the coupled pendulums. it's the distance between the equilibrium point without being coupled to the equilibrium point being coupled. Now how can i calculate the frequency (v max) of the left pendulum?? I just know the period of the right pendulum. I know the max amplitude in left pendulum. How can i calculate the frequency of the left pendulum? ( frequency is induced by right pendulum)? I really need help, its urgent.