Experiement 6 Lab report - Experiement 6 Coefficient of...

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Chapter 34 / Exercise 02
Physics for Scientists and Engineers with Modern Physics
Jewett/Serway
Expert Verified
Experiement 6: Coefficient of FrictionKathryn Webb10/12/15Results/Graphs:Trial Measurements and Calculations TrialFmaxFkFN0.5 kg2.556 N1.314 N6.34 N1.0 kg5.308 N2.183 N11.24 N1.5 kg5.759 N3.152 N16.1409N2.0 kg9.370 N4.202 N21.0406 N2.5 kg12.230 N5.087 N25.9406 NThe Coefficients of FrictionMethodΜsΜkAngle of repose (theoretical).25.23Graph (experimental).4777.1952Percent Error92%13.92%Inclined PlanesMethodTExperimental4.227 NTheoretical 4.235 NPercent Error .19% Conclusion: The purpose of this experiment was to measure and analyze the static friction (Μs) and the kinetic friction (Μk) between a wooden board and a wooden block. The results illustrate the difference between the calculated theoretical values and the graphed experimental values. When the block was placed on an inclined plane it began to slide down the board when the board was raised to an angle of 14 degrees. From there the angle of repose was calculated at .25 for static friction. After graphing the Fmax values versus the Fnvalues, we determined the experimental coefficient of static friction to be .4777. According to these calculations there is a 92% difference between our theoretical and experimental values for the coefficient of static friction. After figuring that the board needed to be inclined to 13 degrees for the block to slide down the board at a steady velocity after a slight tap, the angle of repose was measured, and we concluded that the theoretical coefficient of kinetic friction was .23. We then graphed the experimental values of Fkagainst the F
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Chapter 34 / Exercise 02
Physics for Scientists and Engineers with Modern Physics
Jewett/Serway
Expert Verified