Hooke's law
Experiment Description
The purpose of this experiment is to verify the Hooke's law which relates the extension or compression of a spring with its exerted force given by \( F = -k \times \Delta s \).
Links
- Video: rtsp://elabmc.ist.utl.pt/mola.sdp
- Laboratory: Basic in e-lab.ist.eu[1]
- Control room: Mola
- Grade: *
<swf height="270" width="510">http://www.elab.tecnico.ulisboa.pt/anexos/descricoes-flash/Mola.swf</swf>
Who likes this idea
This experiment is currently hosted at University of Açores. The automation of the experiment was made by IST students as part of the e-lab project.
The first schools involved in hosting this distributed experiments were Escola Secundária Padre António Vieira, Alvalade/Lisboa and Externato Cooperativo da Benedita, Leiria. Escola Secundária Poeta Al Berto in Sines also colaborated.
Experimental Apparatus
The apparatus is composed by a servo motor capable of compress or extend a spring by means of a rod. The spring distension is exactly measured by a potentiometer while the force is detected by a pressure gauge on top of the spring.
It is possible to choose the compression/expansion limits of the spring and the velocity to detect possible hysteresis effects.
Protocol
The user must specify the initial and final servo positions, the number of samples, the time interval between them and the number of cycles to execute (i.e. several compressions and/or distensions). This last option indirectly defines the speed at which the experiment occurs.
Links
https://en.wikipedia.org/wiki/Hooke%27s_lawhttps://en.wikipedia.org/wiki/Hooke%27s_law
