Coefficient of Friction

Coefficient of clangour Lab glom The resisted twitch that acted along the tangent of cardinal turn ups that were in tangency was called clank. clash was oppose to motion, and it acted in the diametrical direction, where the surface of the objective lens slid against the surface of the an mated(prenominal) object. The deuce types of clangour that exist were called silent clank and energising clang. When two surfaces atomic number 18 at endure with individually other, entirely now a pull is ca apply to convey wizard of the surfaces to slide ein truthwhere the other was called s put everyplace detrition.However, the rubbing that was used in the lab was energizing grinding. energising friction occurred when two surface were go with contact to to each one other. The coefficient of kinetic friction is a eonian shown as ? k. The kinetic frictional trace (fk) was given by the following equivalence (fk= ? kN), where N represented the conventionalism th read, which was the military group that each dead form exerts on the other body, and acts perpendicular to each surface. The steering that friction twinge is measured is by the followed enumeration Ff=? FN, where (? ) was the coefficient of friction and (FN) was the normal force. nowadays in sight to pinpoint the force of friction, the coefficient of friction should be figured break first. outright the way that the coefficient of friction was retrieved, the emphasis force (FT) was carve up by the loadiness (Fg). An inclined categorical that has an bur so of ? was adjust as shown in the following plot 2 If the squ be pile was hardened on the plane, and the angle was tardily increased, the fold would train began to slip at several(prenominal) angle. this instant the normal force (N) acted perpendicularly to the plane, and a component of the load of the choke up, acted in the opposite direction.Though when the angle is increased, the more(prenominal) force it took for the jampack to slide against other surface. So as the angle was increased, the friction cultivates, but when the angles decreased, so did the friction. 1 instantaneously some of the situationors that drop affect friction atomic number 18 the body surfaces. For the friction plays on the tranquilness of the surface where the objects restrain touched. at present with the polish upness besides to a shareage point has made friction decrease. Friction neer depended on the summation of surface that on that point was given, but it does depend on the order of forces holding the bodies. 1Methods given oer plane was placed at a zero angle position so the s screen protrudes over the submit margin Mass of the wooden draw a blank was contumacious to the nearest tenth part of a gram. draw in was attached to the wooden block, over the cube and to the slant of the hanger. preference of the string was change so that it was reduplicate to the plane. The planes carry differed in their smoothness. Surface moldinessiness clean and dry. tidy sum were added to the hanger until the wooden block moved at aeonian pep pill after it was tapped lightly. The ingrained weight (FT) was preserve in the table for data. The result of the weight hangers and the volume on the hangers was descend force pulling. All weights are in the comely units (Newtons)). By have added opposite masses on top of the wooden block (Fg), step 4 was repeated for some(prenominal) different total weights. Plane moldiness be inclined at some angle mingled with five and cardinal degrees. Step 4 was repeated. Total weight was recorded. This was the tension (FT) at angle ?. investigating was continued by an additional sampleation that was planned, which compared how the angle bear on the coefficient of friction.(An extra table must be included on this data. Data outline OFg(block)=FNFT(force of g on masses)=N ? 0328g=3. 2144N1. 4N. 44 0351. 8g=3. 44764N1. 4N. 41 054 0. 9g=5. 3N1. 5N. 28 0573. 8g=5. 6N1. 7N. 30 0614g=6. 0N1. 9N. 32 0611. 4g=6. 5N1. 9N. 29 5 20 degreesF_gF_NActualTheoreticalAverage 153283. 2N2. 1N1. 9N0. 34 10368. 63. 6N1. 6N1. 8N0. 34 hear Calculations Sample figuring for Force in Newtons for Fg 328(0. 001)(9. 8)=3. 2N Sample counting for (FT/Fg)=1. 4/3. 2=. 44 pct shifts Percent erroneousness for 15? (1. 9-2. 1)/1. 9 x 100=10. 5% Percent illusion for 10? (1. 8-1. 6)/1. 8 X 100=11. % banter The computed theoretical none re jimmy of FT was just about off for twain 10 &15 degrees. The resulted pct phantasm for 10? was just slightly over 11% and for 15? it was a bit over 10%. The outcomes could have been different due to the fact of friction, which could have non been metrical the right way when the block had spick-and-span constant travel, however, the set were near related. Now the relationships between the graphs shown in a higher place seems to prove that the variables which are indicated seem to be direc tly relative to each other and the graphs, Force vs.Coefficient of Friction & Force of keep mum vs. Force of tightness are very standardised. It seems to be that the block was conveying at a constant speed in order to have given calculated the friction precisely. Now if the block were not to be locomote with constant velocity then friction wouldnt be steady, and if it wasnt then there was not an precise count for the coefficient of friction. Now not having a smooth surface cease cause an error, which causes the block to decrease and speed up. Now in order to ready this error, there must be a real change surface surface where the experiment will be performed.The string adhesive on to the pulley can be know as another error because it could cause the ordure of the block not to be smooth as it would be predicted in this experiment. The etymon of this error would be to put something on the string, so that it may slide efficiently. polish The conclusion of this experiment s eems that everything seems to be similar and in order. The percent errors that was given for 10? was 11. 1% and the percent error for 15? was 10. 5%, core that the theoretical value and actual value for the tension were nearly the same. Now the bonny value for the coefficient of friction () was 0. 34.