Question
A construction worker needs to lift a heavy metal beam using a lever but has a limited length of plank. Which adjustment would allow the worker to lift the beam with the least effort if the position of the fulcrum can be changed but the plank length remains constant?
Asked in RRB JE CBT 2 (Electrical and Allied Engineering) · 2026
Principle of Moments · Physics
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Mechanical work equals force times displacement in the force direction: W = Fs cos θ.
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Famous Discoveries, Laws & Nobel Prizes in Physics has appeared in 44 previous-year exam questions, most frequently in State PSC, UPSC and SSC.
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