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Pendulum waves with 15 balls

Task

Click on the Start button to start the oscillation.

Variant1

Information for variant 1

The ball with the shortest string swings 65 times and the ball with the longest string swings 51 times in 60 seconds.

Pendulum waves

Question

Why do the individual string pendulums swing at different frequencies?

Variant 2

Information for variant 2

In this variant, the length of the threads decreases linearly and can be changed using the slider d.