What is the Principle of the Lever in Physics
Principle of the Lever
In the lever the moment P acts opposite to that of work W. It means that force F tends to rotate the lever in one direction which the weight W rotates in opposite direction. If the magnitude of these moments acting in opposite direction is equal, then the lever will be in equilibrium. It means that:
Moment of P = Moment of W
Mechanical Advantage:
We know that according to Principle of Lever:
Moment of P = Moment of W
Force * Force Arm = Weight * Weight Arm
P * AB = WX BC
AB/BC = W/P
Hence,
MA = W/P = AB/BC = Weight Arm/ Force Arm
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