Torque, or Moment - online Converter

Torque, or moment, of a force about a particular point

Torque, or moment, of a force about a particular point is defined as

  • the product of the force and the distance from the point to the force vector

Expressed mathematically:

M = F a   (1)

where

M = moment of the force (Nm, lbf ft)

F = the applied force (N, lbf)

a = the moment arm (m, ft)

Moment Converter

The calculator below can be used to convert between some common moment or torque units

torque, or moment  (use period as decimal point)

Newton Meters
MilliNewton Meters
Kilogram Meters
Kilogram Centimeters
Gram Centimeters
Ounce Inces
Pound Inches
Pound Feet

Law of Lever

lever torque

The Law of Lever is a torque balance on a stationary object and can be expressed as

F1 / F2 = L2 / L1 (2)

where

F = force (N, lbf)

L = distance from the point (1 or 2) to the force vector (m, ft)

(1) can be transformed to

F1 L1 = F2 L2 (2b)

or

T1 = T2 (1c)

where

T = torque or moment (Nm, lbf ft)

Example - Lever

A person with a mass of 90 kg is standing on one side of a lever 2 m from the balance point. The force on the other side of lever 0.5 m from the balance point can be calculated by modifying (2) to

F2 = F1 L1 / L2

    = (90 kg) (9.81 m/s2) (2 m) / (0.5 m)

    = 3531 N

Related Topics

  • Mechanics - Kinematics, forces, vectors, motion, momentum, energy and the dynamics of objects

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