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# lab5 - Worcester Polytechnic Institute PH 1111 Term A 2007...

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Worcester Polytechnic Institute PH 1111, Term A, 2007 Experiment #5 Lab Worksheet 1. In the frame below, write down your raw data. Report the masses as determined by the mass balance to the nearest tenth of a gram. Your raw acceleration value, of course, needs to be reported in the form “ave ± sd,” with units. State the x- and v x -values to the same precision as given to you by Logger Pro. 2. Calculate the relative standard deviation for a d and a u to three significant digits. 3. Calculate the magnitude of the friction, F f , based on the accelerations a d and a u . Show your work. In writing “answer ± sd,” multiply F f by the larger of the two relative standard deviations above in order to obtain an appropriate standard deviation for F f . 4. A typical result for the magnitude of the friction force in Lab 4 is approximately 0.01 N. Your value above is likely to be about twice as large. Why? Explain in a sentence or two.

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