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The title says it all: this blog features physics videos found everywhere on the web: animations, demonstrations, lectures, documentaries.
Please go here if you want to suggest other nice physics videos, and here if I mistakingly infringed your copyrights. If you understand French, you'll find a huge selection of physics videos in French in my other blog Vidéos de Physique.

Wednesday, 5 January 2011

Mechanical resonance experiment with a pendulum

This is an experiment to find the resonant frequency of a pendulum. The string is 25 cm long: it is easy to calculate its natural frequency (about 1 Hz). First, the pendulum oscillates freely. With a chronometer, you can measure its frequency (1 Hz). Then a vibrator cause a forced oscillation. The oscillator's frequency is varied from 0.7 Hz to 1.3 Hz. The amplitude reach its maximum value at 1 Hz.


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