harmonic_motion.gif (13326 bytes)

COUPLED PENDULUM -
RESONANCE USING A STRING PENDULUM






EQUIPMENT
    redball.gif (326 bytes) Coupled Pendulum Stand with 3 String Pendulum
   



NARRATIVE
              Resonance occurs when a vibrating body transmits energy to another body whose natural frequency is the same as that of the driving body.

            Using the three simple pendula attached to a flexible frame, adjust the lengths of two so that they are identical (all three masses must be identical). Adjust the third pendulum to a different length. Set one of the identical length pendulum into oscillation. After a short time, the energy of the oscillating pendulum will be transferred to the other pendulum of the same length without disturbing the third (unequal length) pendulum. This energy exchange will continue back and forth until it is dissipated through friction or other outside forces.