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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
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?
Microwave cooking 2.4Ghz
MRI Scans
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