lab4 (1) - Physics lab report Students Name Tutors Name...

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Physics lab report Student’s Name: Tutor’s Name: Course Name: Due Date:
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Objective: To measure the coefficient of static and kinetic friction between the surface of the block and lab table; and To check if the collected experimental data fit normal distribution curve. Data: Experiment #1. Two bars on a block Average Standard deviation Number of meas. Static friction 3.267, N +/-0.2834, 36 Kinetic friction 2.242,N +/-0.1682, 34 Experiment #2. One bar on a block Average Standard deviation Number of meas. Static friction 1.962, N +/-0.3436, 15 Kinetic friction 1.229,N +/-0.1008, 15 Bell curve distribution. number of meas. within one std. dev. number of meas. within two std. dev. Two bars Two bars One bar One bar
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Static friction 24 33 15 15 Kinetic friction 15 34 15 15 Mass of a block Mb = 0.1299, Kg Mass of bar # 1 mb1 = 0.499, Kg Mass of bar # 2 mb2 = 0.499, Kg Data analysis: 1. Calculate a static coefficient of friction in case of two bars on a block. You need to apply a formula which relates a force of friction and the weight of the system.Provide a formula, then show the formula with (numbers + units) substituted into it and a final result. fs,max = μs N the fs mean =3.267N N (weight of the system)=((0.1299+0.499+0.499)*10)N =11.279N
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Therefore the co-efficient of static friction=(fs, max)/N =3.267/11.279 =0.2897 2. Propagate the error for the coefficient. You need to apply a general formula to get the
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