The Ups and Downs of Pulleys Research Paper Example | Topics and Well Written Essays - 1750 words

The Ups and Downs of Pulleys - Research physical composition ExampleIn a simple fixed pulley (Fig - 1), one give up of the cockroach short over the grooved disc is tied to the weight being lifted while its other end is free to be pulled down, thereby making an effort to lift the weight. An ideal lot and pulley placement simplifies the work done in pulling the rope and lifting the dispatch against the gravitational pull. It does this by the transmission of analogue motive force of the pull at end, by means of the entire rope to the lifted load at the other end. There is no net force acting on the pulley trunk at equilibrium as the force on the pulley axle is equally distributed along the two arms of the rope passing through the pulley. When the system is in action, the energy conservation principle is followed, with the work done in lifting the load (weight times the distance through which it is lifted) is equal to the tension in the rope or in other words the force with whic h the load is lifted. Lesser the magnitude of the lifting force compared to the weight of the lifted load great is the robotic advantage (MA) of pulleys, which is the ratio of the lifted weight to the force exerted for lifting. The most novel occasion virtually pulleys is that they reverse the direction of the force, thereby minimizing the effort. Pulling something downward is easier being assisted by gravity. So, by tugging at the rope downward, the weight tied to the other end of the rope is easily lifted through the air by a simple fixed pulley. (Walker, 12) The second most fascinating aspect about pulleys is the force by which the load is being pulled is equal to the tension along each rope line. Hence, greater number of ropes makes weight lifting easier and effortless for pulleys as the net weight is divided among the total number of ropes trial through the pulley. Adding multiple pulleys increases the number of rope lines for distributing the total lifted weight among the m (Fig - 3), thereby increasing the mechanical advantage. (Mezzanotte, 14) MATERIALS AND METHODSWe categorized the pulley system into three types the single fixed pulley, the single moveable pulley and the combine system of pulleys. We devised one sample of a fixed and a moveable single pulley and quartette heterogeneous pulley systems combining a fixed and a moveable pulley by ropes combat injury around them in different directions. (Figures - 1 to 7) In each case a weight (W) of ergocalciferol grams was tied to the end of the ropes passing over the disc grooves. First the lifting forces were compared for the fixed and the moveable single rope and pulley systems (Figures - 1 & 2) and the data was collected to be analyzed. The next level of comparison was extended for the compound pulleys (Figures - 3 to 7) and the collected data was correlated with the first set. RESULTSThe results for the single fixed and moveable pulley system are tabulated belowPulley TypeLifted Weight (in gr ams)Weight equivalent to the exerted force automatonlike Advantage