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The Real Pendulum
Tommy Nguyen
Phy101L
11/28/07
Composite Discussion:
The goal of this lab is to find and study the motion of a physical
pendulum for which the angular displacement theta will approach 45 degrees, and which has a
small but detectable damping associated with it. We will also observe the conservation of energy
in the pendulum system.
T = 1.3 s +/ 0.1 s
T
0
= 1.337s +/ 0.0 s
T
Real =
1.347s +/ 0.0 s
As you can see, the values of the periods are very similar in value and the values agree
with each other. The model of the real pendulum seemed to be the best simulation from our data.
This was unexpected because we figured that the theoretical simulation would come closest to a
sinusoidal wave since it was the experiment we could control the most which would lead to little
error.
The function for the harmonic pendulum is given as 0.34*Cos(0.5 + 4.70t). The function
for the damped harmonic motion is given as e
0.05t
(0.34*Cos(0.5 + 4.7t). The difference in the
functions lies with the addition of the e
0.05t
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 Spring '08
 None
 Physics

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