Experiment to Determine the Coefficient of Friction

Experiment to Determine the Coefficient of Friction disciple Name Ahmad RazaSummaryThis essay has two aims. The first aim of this experiment is to determine the coefficient of clangour on an bed savourless by employ various materials tray. secondly, to verify that the hug have already found which were require to move a body on an inclined savorless. We have provided setup to do this experiment that include clean mark bland, load hanger, distinct saddles and 4 trays of antithetical materials such as aluminium, brass, nylon and ferado. Firstly, we place tray at the midway of plane and put one over weight on weight hanger until tray starts to move. Note the go and get the coefficient of rubbing. For this purpose we have found the formula strong suit and glide. Then, by use formula of coefficient of friction we found the value, which was approximately 0.18 at 10, 20 and 30. Nevertheless, the additional 10N weight was added except the friction coefficient but the slant leave behind remain same. The experiment was satisfyn by cumulation the stairs good circumstances. However, errors great deal be reduce by overlapping the erroneousness that was take place in this experiment. This experiment could be make hardly the same as international standard if the following conditions apply on it.CHAPTER 1 INTRODUCTIONAIMS AND OBJECTIVEThe aims of the friction experiment are to find the coefficient of different combination of material which is in this experiment, the brace bar. Making utilize of inclined plane, also to study equilibrium and non-equilibrium of a body of an incline plane under the action of the force. The objective is to understand that a coefficient of friction could be determine via incline plane, collect experiment data and augur the corresponding results and coefficient and finally to compare the value of coefficient generated from different pairs of surface.1.2 THEORY AND desktopFriction can be defined as the force that v olition resists the relative motion of solid surfaces which are sliding over against each other. in that respect are mainly three types of friction. Dry friction, Fluid friction and natural friction but this particular experiment was just examined only for juiceless friction. Dry friction is the encountered when two dry surfaces are in prescript if there is a tendency of sliding. However this dry friction has crock up into two sub frictions as inactive and energizing. Commonly, kinetic frictional force will be less than the absolute maximum value from the dormant frictional force. This static frictional force is derived as fs = sN, while kinetic frictional force is fk =kN, where s is the coefficient of static friction, k is the coefficient of kinetic friction, N is the normal force and is the proportionality constant and called coefficient of friction.An inclined plane can be defined as any(prenominal) plane surface positioned at an move with respect to the naiant plane. At the moment of sliding, the friction force must be the same to the element of weight acting down the plane.W .cos =W .sinThis leads to the concept of the angle of the friction = tanCHAPTER 2 APPRATUS AND experimental military operation2.1 APPRATUSAdjus remand stainless steel plane work out with base.5N load hangerWeightsTrays of aluminium, governing, Nylon and FeradoFig1.1 Wood plane and trays2.2 experimental surgical operationAs we discussed above, we have two aims for this experiment. Each aim has different procedure.2.2.1 Following procedure is to find the angle of friction on a steel plane by employ different materials. We have given over four trays for this experiment such as Aluminium, Brass, Nylon and Ferado. First of all set the plane of stainless steel at 0 slope by ensuring that it is in horizontal plane. Afterward, set the tray of any material at the middle of stainless steel plane then apply weight at the end of plane by weight hanger and note the angle of inc lination when tray starts to slide. Take coefficient of convert to evaluate static refraction (s).Repeat the same procedure three clock and take the average. Subsequently, to evaluate the angle of sliding friction (k) , place the tray again in the middle of plane and reduce the tilt as this fourth dimension tilt was increased, we keep pushing the tray till it started to move and note the angle for three times and take the average.Static deflection (s) cadence angle for static deflection by using Aluminium traymesa 1.1 Aluminium trayMeasure angle for static deflection by using Brass trayTable 1.2 Brass trayMeasure angle for static deflection by using Nylon trayTable 1.3 Nylon trayMeasure angle for static deflection by using Ferado trayTable 1.4 Ferado tray slide Friction (k)Measure angle for sliding friction by using Aluminium trayTable 2.1 Aluminium trayMeasure angle for sliding friction by using Brass trayTable 2.2 Brass trayMeasure angle for sliding friction by using Nylon trayTable 2.3 Nylon trayMeasure angle for sliding friction by using Ferado trayTable 2.4 Ferado tray2.2.2 Following procedure is to verify the force required duplicate to an inclined plane to move a body up the plane corresponds to the friction coefficient already found. First of all set the stainless steel plane horizontally at 10 slope. Place the towing cord and weight hanger in position to pull the tray up to the plane by placing any material tray at the lower end of plane. Add load to the hanger until the tray, given a slide push, slides slowly up the plane. Repeat the same procedure by applying 10N weight at angle 20 and 30.CHAPTER 3 CALCULATIONS AND RESULTS3.1 mathematical process 1As we found angle above, now to find coefficient of static deflection, take tan .For Aluminium (Tan15.8) = 0.28For Brass (Tan14) = 0.25For Nylon (Tan20) = 0.36For Ferado (Tan18.8) = 0.34Table 3.1 Coefficient of static deflectionAs we found angle above, now to find the coefficient of slidin g friction, take tan .For Aluminium (Tan10.8) = 0.19For Brass (Tan15.1) = 0.27For Nylon (Tan12.3) = 0.22For Ferado (Tan13.7) = 0.24Table 3.1 Coefficient of sliding friction unconscious process 2First of all find the normal forceNormal force out = W.cosNormal Force = 3.58.cos10Normal Force = 3.52 NSecondly find the Sliding forceSliding Force = p-(W.sin)Sliding Force = 1.2-(3.58.sin10)Sliding Force = 0.58 NNow as we have two normal and sliding force, we can find Friction Coefficient Friction Coefficient = Sliding force / Normal forceFriction Coefficient = 0.58 / 3.52Friction Coefficient = 0.16All the determine were measured for angle 20 and 30 as shown in the table below.Table 4.1Nevertheless, the additional 10N weight were added but the friction coefficient and angle will remain same as shown above in the table which marchs that weight cannot change the angle and coefficient of friction.By converting mass of the tray into weight we can prove the experiment.W = mgW = 0.365*9.81W = 3.58 NCHAPTER 4 epitome AND DISCUSSIONSubsequently investigation in the data, we all observed that guessing is true, where the static along with kinetic friction is usually affected by the mass of body. The coefficient in the kinetic along with static friction is unyielding by materials used for each call surfaces. The coefficients will never ceaselessly be bigger than 1 and the coefficient connected with kinetic friction is unquestionably more compact as opposed to among static friction for that superposable scenario. The value of coefficient of friction is 0.18.The laboratory on the other hand, we all would arise up with a vibrant mistake thats produced each of our kinetic friction importance unfeasible, as the importance for we all received ended up being caused by the tension pulling on the block.However, there were most systematic error occur while doing experiment. These errors were arisen due to string and hanger as they were not straight and each group member have d ifferent value while taking reading.CHAPTER 5 CONCLUSIONThe experiment was interpreted under good circumstances. However, errors can be reduce by overlapping the mistake that was take place in this experiment. This experiment could be done exactly the same as international standard if the following conditions apply on it. First of all make sure that the hanging tidy sum do not move while adding additional weight on load hanger. This experiment will be really useful in the future to determine the coefficient of friction for different materials.REFERENCEJohn, B Carl,T.F.T.F. Ross (2002).Mechanical technology Principles. Oxford Taylor Francis.APPENDIX ACHAPTER 1.. CHAPTER 2.. CHPATER 3.. CHAPTER 4.Page 1 of 11