Johnston, Philip Devereux, 1855- · New York, D. Williams Company · leaf 32
P = Wheel and Axle.W 1 ... PL Pa \ -W +P Wa W L = W + P … Differential Block.Power multiplied by radiusof crank is equal to the loadmultiplied by half the differenceof tlie radii of the two parts ofthe axle or drum. Pulley.—Load is equal to the power multiplied bythe number of parts of rope supporting the load orrunning block. This law^ applies only when…
Mechanical drawing
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