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Formulary Leverage ratio


Unilateral lever with identifiers

Two-sided lever with identifiers


In the upper one-sided lever and in the lower two-sided lever, the torque on the right-hand-side must be the same as the torque on the left-hand-side. These torques are the product of force and lever-arm. The lever-arm is measured between the point of force application and the fulcrum.

F1 · l1=F2 · l2

    F2·l2
F1=
        l 1

    F1·l1
F2=
        l2

      F2·l2
l1=
        F1

      F1·l1
l2=
        F2

Check your calculation!     You need help?
Please enter numbers only in three of the four fields!
F1 Force N kN
F2 Force N kN
l1 Lever-arm mm cm dm m
l2 Lever-arm mm cm dm m
Places behind the comma: 2 3 4 5

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