Device description:
The exhibit consists of two swings connected with a rope - they are a model of coupled pendulums. By sitting on the swing, we become part of this model.
http://cngsystem.pl/pl/realizacja/dwie-sprzezone-hustawki/
Phenomenon:
When one of the people swings his swing, and then both people allow the swings to move freely, we can observe the phenomenon of transmission of vibrations: the so far immobile swing, it swings with increasing amplitude.
At the same time, the vibration amplitude of the first swing decreases. After a while, the cycle repeats itself. The phenomenon does not take place forever due to the resistance to motion in the system. The coupled swings refer to the harmonic oscillator model. It examines the interaction of two bodies. The relationships found in this way are the basis of particle physics.
How to perform an experiment?
Have one person set his swing in motion while the other person keeps his or her in a position of balance. When the swing amplitude of the first swing is considerable, let both people allow the swings to move freely.
How do the swings behave? Try to swing in such a way that the swings are moving in the same direction at the same time - this is a symmetrical oscillation. Try to swing in such a way that the swings are moving in opposite directions at the same time - this is an anti-symmetrical oscillation.