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Pulleys Lab
Pulleys LabQuestionHow do Pulleys effect the input/output of a system? What is the ideal mechanical advantage of a system?ConceptIn an ideal system of pulleys, all the energy is transferred from the input to the output without any losses to friction and other forces. Theoretically the efficiency of a system should always be 100% but in real life applications it will always be less than 100% due to miscellaneous forces. The IMA of a system can be found by dividing the distance moved for the force by the distance moved for the load. In The work for input and output would be equal to the force (N) x the distance moved(m). Work input = FeDe IMA = De/DrWork output = FrDr Efficiency = Work output/ Work inputHypothesisIf there are more pulleys present in a system, then I will increase the IMA, therefore changing the ratio of force to distance of the load. In real life applications, the efficiency of a system will always be less than 100% due to friction and other forces. Materials2 single pulleys 2 double pulleys Set of hooked metric masses Meter stick StringSpring scalePulley supportProcedureSet up the system of pulleys according to the diagrams given.Use the Spring scale to move the load a certain distance from the other end of the system. Record the distance moved by the load and the distance moved by the force.Record the forces of the mass and the spring scale.Repeat steps 1 – 4 with 2 different masses for each pulley system. Place all the data collected on a chat.Data CollectionTable 1Pulley ArrangementMass raised(kg)Weight (w)Of mass (N)Height (h) mass is raised (m)Force (F) of spring scale (N)Distance (d) through which force acts (m)(a)0.5kg4.9N.17m4.9N.165m(a)0.2kg1.96N.21m1.8N.22m(b)0.5kg4.9N.135m2.6N.265m(b)0.2kg1.96N.175m1.0N.34m(c)0.5kg4.9N.045m2.4N.09m(c)0.2kg1.96N.035m.85N.07m(d)0.5kg4.9N.04m1.1N.16m(d)0.2kg1.96N.065m0.6N.26mTable 2Pulley ArrangementWork output (wh)(J)Work input (fd)(J)IMA(De/Df)MANumber of lifting stands Efficiency (%)(a)0.833J0.8085J0.971103%(a)0.4116J0.396J1.0481103%(b)0.6615J0.689J1.96296%(b)0.343J0.34J1.0482101%(c)0.2205J0.216J22102%(c)0.0686J0.0595J22115%(d)0.196J0.176J44111%(d)0.1274J0.156J4482%
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By: dnam1234
Submitted: October 29, 2017
Essay Length: 730 Words / 3 Pages
Paper type: Lab Report Views: 299
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