# m9 - In the next activity we observed a pendulum that has...

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Analysis: In Lab 9, simple pendulums and their variants were observed. First of, in activity 1, a simple pendulum was observed, and it was discovered that the oscillation of a simple pendulum was 1.19% different than it’s the calculated theoretical oscillation based on length. Since the observed period of oscillation for simple pendulum was so close to the theoretical, the minor difference can be attributed to air drag, or graph reading error. We also observed that changing the hanging mass of the pendulum to not affect the period of oscillation since the difference between the two different masses came out to be 0.69% difference. This is due to the fact that the length is the same and the period only depends on the length of the pendulum. The minor percent difference could be attributed to the inconsistency of the place on the rod where the mass was attached.
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Unformatted text preview: In the next activity, we observed a pendulum that has been damped, and unlike a simple pendulum, a damped pendulum’s amplitude of oscillation changes with time due to friction. We observed that 77.9% of the energy was lost during each oscillation. Sources of error in this part could be attributed to air drag. In the last activity, an open pendulum was observed and it was concluded that a simple pendulum model cannot be used to describe the situation since, with an open pendulum no mass was attached and thus the percent difference between periods of observed and theoretical came to be 17%. This could have been attributed to air drag. Conceptual 1. No, the angular acceleration is not constant during motion but sinusoidal with amplitude. It can be equal to zero when the amplitude is zero. 2. The period equals 1.412 seconds....
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