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?
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Length of crow bar = 2m
length of load arm = 0.1M
length effort arm = length of crow bar -length of load arm
=2−0.1=1.9m
so, velocity ratio = length of effort arm/length of load arm = 1.9/0.1 = 19
use formula, velocity ratio = load/effort
19 = 100kgf/effort
effort = 100/19= 5.26 kgf
hence,5.26 effort is required
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guys please help this question
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