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Resonance. Bartons pendulums. Observe the Barton’s pendulums Write down two observations. 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. Bridge resonance.
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Bartons pendulums • Observe the Barton’s pendulums • Write down two observations.
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.
Bridge resonance • Tacoma Narrows bridge disaster
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
Resonance of a helicopter • Chinook ground test
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.
Can you break a glass by singing? Breaking glass?