# Experiment 6 coefficient of friction2.docx - Results In...

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ResultsIn this experiment, the frictional force between a wooden block and the wooden surface of a horizontal and inclined plane were measured, and from the plotted data, the coefficients of static and kinetic friction were obtained. Again, angle of repose method was used to determine coefficient of static friction, and lastly, coefficient of kinetic friction was measured by second method called constant velocity method.Coefficient ofFrictionPulling method(HorizontalPlane)Sliding methods(Inclined Plane)Percentage DifferenceStatic (μs)0.4712tan15 = 0.267943.13%Kinetic (μk)0.1755tan10 = 0.1763Sample CalculationsMass of wooden block = 154.2 gramsTotal mass(mass of weight+mass of block)Static frictional force (Fs)(N)Kinetic frictional force (Fk)(N)654.2g3.0961.0161154.2g6.4172.2921654.2g7.7333.1362154.2g10.873.7662654.2g13.124.3303154.2g14.525.757For mass of weight = 500 grams and mass of block = 154.2 grams, static frictions at three bombs were measured as 3.635N, 2.797N and 3.724N. The static frictional force can be calculated by taking their average value.Fs= (3.635+2.797+3.724)/3 = 3.385NFrom the corresponding slopes of the graphs plotted between Frictional force and Normal force (which has been attached herewith),Coefficient of static friction (μs) = 0.4712Coefficient of kinetic friction (μk) = 0.1755Block on an inclined plane