A block and tackle having a velocity ratio of 5 is used to raise a load of 400N through a distance of 10m. If the work done against friction is 100J. Calculate 1. Efficiency of the machine 2. The effort applied
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block, screw jack, calculation of mechanical advantage, efficiency, ... Where, P = Effort applied, Wi = Ideal Load, V.R. = Velocity Ratio ... axle and that of lower block is having a.
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