Experiment: Velocity and Air-Resistance
Table: Coffee Filter Data
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Procedure 1
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1 Coffee Filter
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2 Coffee Filters
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Height of Table (m)
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Total Time (s) - Trial 1
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Total Time (s) - Trial 2
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Total Time (s) - Trial 3
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Total Time (s) - Trial 4
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Total Time (s) - Trial 5
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Avg:
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Avg:
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Calculated Average Speed (m/s)
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Procedure 2
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Measured Height (m)
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Total Time (s) - Trial 1
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Total Time (s) - Trial 2
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Total Time (s) - Trial 3
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Total Time (s) - Trial 4
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Total Time (s) - Trial 5
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Average Time (s)
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Calculated Height (m)
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Questions:
Draw a FBD for the falling coffee filter. What is the net force? What are we assuming by using the average velocity from Procedure 1 to estimate the height of the fall in Procedure 2? Is the object actually traveling at the average speed over the duration of its fall? Where does the acceleration occur? Draw the FBD for the 2-filter combination, assuming constant velocity. What is the net force? How do your measured and calculated values for the height in Procedure 2 compare? If they are significantly different, explain what you think caused the difference. Why do two coffee filters reach a higher velocity in free fall than one coffee filter? How would the FBD differ for a round rubber ball dropped from the same height?