FORCED OSCILLATOR AND RESONANCE Description and Specifications for Lab Tenders
FORCED OSCILLATOR AND RESONANCE.
FORCED OSCILLATOR AND RESONANCE A mechanical system including a mass and a spring can
oscillate following its natural simple harmonic motion, or it can
be forced to oscillate.
At a certain distance from the equilibrium position, an ideal
spring (that is a spring complying with Hooke’s law perfectly)
to which a mass has been applied, returns the mass towards
the point of equilibrium with a force and oscillates with natural
frequency.
If a force varying with sinusoidal trend is applied to this mass,
this force will provoke a forced oscillation. In the beginning,
the body keeps its own oscillation frequency, but then it
is obliged to follow the frequency obliged by the external
force. If this frequency approximates the natural frequency
of free oscillation of the body, amplitude will tend ad infinium
(resonance condition).
The equipment consists of a mass fixed onto a spring
connected with a string passing over a pulley and then with a
driving wheel. The frequency of the driving wheel is displayed
(in Hertz) on the panel. The mass fixed onto the spring can be
forced to oscillate freely, or it can be damped in a tube full of
water.
This system can operate at various frequencies and amplitude
can be measured on a proper scale.
Using the Datalogger and a motion sensor (supplied as options)
will enable to display the system oscillations on the software.
TRAINING PROGRAM
• demonstrating/studying resonance in forced oscillations
• determining the elastic constant of a spring