What is the strength gain for a lever with a fulcrum in the center?

univerkov | January 10, 2021 | education

For the balance of the lever, the following rule is true: the product of the force F1 and the shoulder l1 on the one hand is equal to the product of the force F2 and the shoulder l2 on the other side.
The shoulder l is the distance from the point where the force is applied to the fulcrum.
F1 * l1 = F2 * l2.
F2 / F1 = l1 / l2.
Since l1 = l2, then F2 / F1 = 1 – the force does not change.
Answer: There is no gain in force for a lever with a fulcrum in the center.

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