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Resonance Phenomenon in Barton’s Pendulums

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Presentation Transcript

  1. Resonance

  2. Bartons pendulums • Observe the Barton’s pendulums • Write down two observations.

  3. Resonance occurs when the frequency of the driving force matches the natural frequency of the oscillating body. • When this occurs a large amplitude vibration is observed.

  4. Bridge resonance • Tacoma Narrows bridge disaster

  5. The “Millenium Bridge”, a foot bridge in London oscillated alarmingly when first opened. • This is illustrated in the video clip • video • The bridge had to be closed and modified to eliminate these oscillations

  6. Resonance of a helicopter • Chinook ground test

  7. Rice on a vibrating plate • Note the plate has many resonant frequencies, you will notice the amplitude increase at each of these different modes of vibration.

  8. Can you break a glass by singing? Breaking glass?

  9. Microwave cooking 2.4Ghz

  10. MRI Scans

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