Deriving The Expression For The Efficiency Of Screw Jack
Efficiency of a Screw Jack - may be defined as the ratio between its input effort which is applied at the lever end to the magnitude of work done or the weight lifted by the screw jack device.
Analyzing the standard equation which is given as,
P = W tan (alpha + phi)
Where P = effort required to move the load,
W = weight required to be lifted by the screw jack,
Alpha = angle of the screw helix,
Mu = coefficient of friction across the screw and the nut which is equal to tan phi (where phi is equal to the angle of friction)
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