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Unformatted text preview: Laboratory 3: Motion with Nonuni Physics 127/141 - Wint Replace with both your names, current date and section number Please name your file uniqname.xlsx, and save one copy for each student Experiment 1: Motion of a Spherical Object with Air Resistance Trial 1 Graph Trial 3 Graph Trial 3 Graph Mass (kg) Trial 1 Trial 2 Trial 3 Trial 4 Terminal Velocity (m/s) Experiment 2: Motion of a Conical Object with Air Resistance Trial 1 Graph Trial 3 Graph Trial 3 Graph Mass (kg) Trial 1 Trial 2 Trial 3 Trial 4 Terminal Velocity (m/s) Experiment 3: Model Fitting and Statistics Balloon
12 10 8 ln(mass) 6 4 2 0 0 2 4 6 8 10 12 ln(terminal velocity) ln(mass) vs. ln(vterm) [balloon] Column H (Problem 3.6) Based on your two linear fits for the logarithmic graphs, is the c What about the balloon? Which one has a higher value for n? What is one plau (Problem 3.7) The balloon is approximately spherical. Using the expression fo approximate (order of magnitude) estimate for the Reynolds number of the ba experience laminar or turbulent air resistance under these conditions? Does t (Problem 3.8) Suppose a sphere travels at the same speed through air and thr likely to be laminar? Why? Balloon Your data Other groups' data Mean Number of trials Standard deviation Error of the mean 95% C.I. (lower bound) 95% C.I. (upper bound) (Problem 3.9) Does either of the confidence intervals include the value 1.0? If the object was experiencing laminar or turbulent flow? Be careful about your w never prove them to be true. (Problem 3.10) What is one way we could improve the accuracy of our measur why you think your approach would be better. (Maybe we will adopt it in future Motion with Nonuniform Acceleration ysics 127/141 - Winter 2010 ance Trial 2 Graph Trial 4 Graph Trial 4 Graph erminal Velocity (m/s) ln (Mass) ln (Terminal Velocity) ce Trial 2 Graph Trial 4 Graph Trial 4 Graph erminal Velocity (m/s) ln (Mass) ln (Terminal Velocity) Cone
12 10 8 ln(mass) 6 4 2 0 0 2 4 6 8 10 12 ln(terminal velocity) ln(mass) vs. ln(vterm) [cone] Column H e logarithmic graphs, is the cone experiencing laminar or turbulent air resistance? value for n? What is one plausible explanation for this? ical. Using the expression for the Reyonolds number in Equation 5, give an e Reynolds number of the balloon in our experiments. Is the balloon expected to der these conditions? Does this match what you observed? Explain. me speed through air and through water. In which case would the flow be more Cone vals include the value 1.0? If one did, what would be your conclusion about whether flow? Be careful about your wording. In statistics, we can only reject hypotheses, e the accuracy of our measurements of terminal velocity in this experiment? Say aybe we will adopt it in future years...) olumn H ...
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