How a lever lifts a load
Can a small push lift a heavy load?
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Experiment with the same lever model
The science — equations and assumptions
For an ideal lever in static rotational equilibrium, clockwise and counterclockwise torques balance: Feffort × deffort = Fload × dload. Thus Feffort = Floaddload/deffort. Distances are perpendicular moment arms in metres, forces in newtons, torques in newton-metres.
The rigid beam, frictionless pivot and negligible beam weight are idealisations. The lever does not create energy: the effort end moves farther than the load end. Rendered angles and distances are schematic, not metrology-grade. The motion is illustrative, not a rigid-body simulation.