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

• Lab Report
• titomkubwa
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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
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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• Spring '15

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