Perform an experiment Essay Example for Free

Perform an audition EssayI am going to perform an taste on skirmish and the variables of clash use a wooden throng, a piece of string and a due north meter. I will foot race 3 variables slant, surface study and surface texture. Each testify will be repeated 5 propagation to get a decorous range of results. Friction is the force of two objects rubbing unneurotic and slowing and/or stopping each separate. The make out of friction produced depends on the appearance of its surface for shell The surface of the sand constitution has deep slopes and the surface of the paper has to move up and down those slopes to proceed, causing friction. My graduation exercise test will be done to measure the affect of weight on the amount of friction between the block and the table top. The block ill be placed on the table and the atomic number 7 meter tied to it. Then the Newton meter will be pulled until the block starts to move and as soon as it does the amount of Newtons needf ul to cause that movement will be recorded. This will be done 5 times then averaged. To make sure it is a fair test I will use the aforesaid(prenominal) Newton meter and the equivalent wooden block to avoid introducing other variables I will excessively use the same section of table using the same boldness of the block every time.I will be vigilant of how I pull the Newton meter, the lamentable force should be par whollyel to the supporting surface because pulling it up will lessen friction and pulling it down will increase friction. I reckon that as the weight on the block increases so therefore does the down force, increasing the amount of friction because it becomes more difficult for the ridges to pass everyplace each and so a block with less/smoother ridges would find its passage a disseminate easier.When the experiment was carried out, as I predicted, when the weight on the block increased so therefore did the Newtons infallible to move it from a fixed position. The t est was done with 2 Newton meters over 2 days. use the same Newton meter was impossible as it broke. My results were as follows Weight of block = 2. 0N Weight T1(N) T2(N) T3(N) T4(N) T5(N) Average(N) finish.Block + 5N 2. 8 3. 5 4 3. 5 3. 6 3. 5 In the first experiment weight was tested and a set of results produced. In this second experiment the surface area in connection with the desk will be tested. To obtain my results I will use the following method, the block will be placed on two sheets of paper a heedful distance apart with a Newton meter tied to it. The block will then be pulled and as it begins to move the amount of Newtons required to cause this will be recorded. Each test will be done 5 times then averaged.To make sure it is a fair test I will as the same Newton meter ensuring non-introduction of new variables, use the same side of the block, use the same two pieces of paper and make sure the blocks movement is parallel to the supporting surface. I predict that as the surface area of the block exposed to the desk increases so will the amount of Newtons required to move it because there will be more sharper ridges to pass over therefore requiring more Newtons. My results were as follows Exp mm2 T(n) T2(n) T3(n) T4(n) T5(n) Avg(N).My prediction on 1 or 2 of the results was correct or partially correct but on the whole I fear my prediction was incorrect as it seems the surface area (exposed to the desk) does not greatly affect the amount of Newtons that is required to move it, any affect it does restrain is not continual and seemingly erratic.The friction experiment has now been done with 2 variables weight and surface area. I pay back now come to the triplet and final, surface texture. To test the affect of surface texture on friction, I will, Place the block on the surface with a Newton meter tied to it, the meter will then be pulled and as soon as the block shows signs of movement I will record the amount of Newtons needed. Each test will be done 5 times then averaged.To make sure it is a fair test I will unless it breaks use the same Newton meter, I will use the same block and the same side of the block every time, I will use the same centerfield/type of nerve for instance making sure the sandpaper comes from the same sheet. I will also keep the movement of the block parallel to the supporting surface. Although smoothness is hard to measure I predict that the smoother a substance is to the touch, the less friction will be produced, because the smoother a substance is to the touch the less sharp or outstanding the ridges are, therefore the less resistance they cause.Key Substances ti based carbon paper Si Emery paper Bs Sand paper S disconcert top TT Plastic Bag Pb Substance T1(N) T2(N) T3(N) T4(N) T5(N) Average S As I predicted the smoother a substance feels to be, the less it causes resistance, as shown in the results. I followed my method very rigorously any variation caused by my hand is small to negligible, an d would not greatly affect the results.I have come to the conclusion that for a substance to reach minimal resistance it can achieve this existence light weight, smoothly textured and have minimal contacting surface area with the opposing surface. If a substance is required to have maximum resistance it would be the opposite. I feel the experiment was performed rather strong but there is room for improvement, to have possibly got fairer more accurate results I could have maybe repeated the experiment once or twice on all of them, then I would have more data to analyse giving me a better chance at accuracy.In all the three experiments instead of using the human hand to pull the Newton meter use a machine which would be less prone to inconsistency and use a table top secrete of blemishes. In the second experiment the block could have been placed on previously constructed platforms each measured to have 4 sides the same and those sides to be the measurements used meaning the non ne ed of paper and a give out more accurate readings.