A rescue team uses a long steel rod as a lever to lift a heavy concrete slab. To minimize the force required, where should the fulcrum be positioned?

Question

A rescue team uses a long steel rod as a lever to lift a heavy concrete slab. To minimize the force required, where should the fulcrum be positioned? — Exam MCQ

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A. Near the slab being lifted — The correct choice is Near the slab being lifted. It follows from the relevant Newtonian mechanics, motion, work, energy, power or simple-machine relationship.

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B. Away from both the slab and the effort

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C. Exactly halfway between the slab and the effort

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D. Near the point where the force is applied

A rescue team uses a long steel rod as a lever to lift a heavy concrete slab. To minimize the force required, where should the fulcrum be positioned?

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