A person lifts a load of 400N with the help of a lever by applying an – InterviewSolution

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1.	A person lifts a load of 400N with the help of a lever by applying an effort is applied at a distance of 2m from the fulcrum. Find the value of MA,VR and efficiency?
Answer» of crow bar = 2mlength of LOAD arm = 0.1Mlength effort arm = length of crow bar -length of load arm=2−0.1=1.9mso, VELOCITY RATIO = length of effort arm/length of load arm = 1.9/0.1 = 19use formula, velocity ratio = load/effort19 = 100kgf/efforteffort = 100/19= 5.26 kgfhence,5.26 effort is required

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