Damped Pendulum Oscillations - Revision history

Ist12916: /* Description of the Experiment */

2020-05-07T08:51:55Z

Description of the Experiment

Ist12916: /* Description of the Experiment */

2020-05-07T08:44:32Z

Description of the Experiment

Ist165721 at 14:33, 21 April 2013

2013-04-21T14:33:33Z

Ist165721: Tradução das legendas.

2012-05-24T21:11:24Z

Tradução das legendas.

Ist165721: Texto inicial

2012-05-24T20:59:25Z

Texto inicial

New page

=Description of the Experiment=
The purpose of this experiment is to determine the friction constant in a oscillating round motion.

=Experimental Apparatus=
The pendulum is launched, and the user can choose the length of the rod and the initial angle. The pendulum's rod is attached to the head of a salvaged hard-drive. This allows a measuring of the pendulum's angular velocity, as a function of time.

=Protocol=
[[File:pamortecido-graph1.jpg|thumb|Figura 1: Dados obtidos no laboratório, sem qualquer resistência activa, com o máximo de amostras, bem como o máximo da frequência de amostragem.]]

[[File:pamortecido-graph2.jpg|thumb|Figura 2: Ajuste dos primeiros três periodos à lei da sinusoide com decaímento. A constante de atrito é, neste caso, 0.0122 s-1.]]

Under construction.

=Advanced Protocol=
The oscillation period decreases, even though the first three do not show this. Why? Find the mathematical expression that explains this behavior and fit it to the experimental data. Change the friction parameter and find the new friction constant.

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 =Description of the Experiment=
-The purpose of this experiment is to determine the friction constant in an harmonic oscillatory motion.
+The purpose of this experiment is to determine the friction constant in an harmonic oscillatory motion of a pendulum. Friction is generated by a variable electric charge in parallel with a hard disk motor placed on the shaft of the rigid pendulum acting as a generator. By varying this resistive load, the power consumed varies depending on the frequency of oscillation and its value.
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← Older revision		Revision as of 14:33, 21 April 2013
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	=Advanced Protocol=		=Advanced Protocol=
−	The oscillation period decreases, even though the first three do not show this. Why? Find the mathematical expression that explains this behavior and fit it to the experimental data. Change the friction parameter and find the new friction constant.	+	The oscillation period decreases, even though the first three do not show this. (Why?) Find the mathematical expression that explains this behavior and fit it to the experimental data. Change the friction parameter and find the new friction constant.
		+
		+
		+	=Links=
		+	*[[Oscilações de um Pêndulo Amortecido \| Portuguese version (Versão em Português)]]

@@ Line 8: / Line 8: @@
 =Protocol=
-[[File:pamortecido-graph1.jpg|thumb|Figura 1: Dados obtidos no laboratório, sem qualquer resistência activa, com o máximo de amostras, bem como o máximo da frequência de amostragem.]]
+[[File:pamortecido-graph1.jpg|thumb|Figure 1: Data without any active friction, maximum samples and maximum sample rate.]]
-[[File:pamortecido-graph2.jpg|thumb|Figura 2: Ajuste dos primeiros três periodos à lei da sinusoide com decaímento. A constante de atrito é, neste caso, 0.0122 s-1.]]
+[[File:pamortecido-graph2.jpg|thumb|Figure 2: Fitting of a damped sine to the three first periods. The friction constant is, in this case, \(0.0122 s^{-1} \).]]
 Under construction.