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Mechanics and Machines Calculations Menu
A simple pulley and drum may be used to lift a weight by applying a force with a rope which is wrapped about he outer diameter of one of the diameters.
F:W = r:R |
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F = (F x R)/R |
F x R = W x r |
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W = (F x R)/r |
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R = (W x r)/F |
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r = (F x R)/W |
Where: W = Unknown weight
F = Applied force
R = Radius large diameter
r = Radius small diameter
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