Bartons pendulums
Observe the Barton’s
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
Narrows bridge
 The “Millenium Bridge”, a foot bridge in
London oscillated alarmingly when first
 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?
Microwave cooking 2.4Ghz
MRI Scans