INFO:
Numerical simulation of 15 undamped driven pendulums with the same constant driving frequency and amplitude for all pendulums. The driving frequency is close to the resonance frequency of the middle pendulum which after a short time, shows by far the strongest amplitude finally resulting in a resonance catastrophe . The simulation also shows the phase difference between the driving motion and pendulum motion of the pendulums with the small (0¡) and bigger (180¡) masses.
Undamped driven pendulums - Stock Video Clip - K003/5864 - Science Photo Library