Jeulin Guppy F033B Notice page 19

ESAO Method
Gyppy rapid camera
Ref :
451 462
ENGLISH
The synchronisation function allows synchronising the various curves.
For example, it is possible to synchronise when the pendulum swings through
the vertical position (that is zero).
6.5 Recording
Move the pendulum by an angle of approximately 10°.
Start recording by clicking on the green light.
Release the pendulum, recoding will start as it passes through the vertical, that
is at zero.
Move the pendulum by an angle of approximately 7°,
Start recording by clicking on the green light.
Release the pendulum, recording starts as it passes through the vertical, that
is at zero.
Perform the same operation a third time from 4°C.
6.6 Results obtained
The video synchronised with the angle measurement allows demonstrating the
fact that the peaks and the troughs of the sine wave always corresponds to an
extreme position of the pendulum movement.
The period does not change practically at all for the curves recorded. There is
isochronism of the oscillations for small angles.
The different curves are damped taking into account friction.
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