Define torque as the turning moment of a force

- Torque is defined as the rotating moment or turning effect of a force.
- We can define torque mathematically as:

\begin{align} \tau = F \times d_\bot \end{align}

where:

- $\tau$ is the Torque ($Nm$)
- $F$ is the Force applied ($N$)
- $d_\bot$ is the
**perpendicular**distance to the pivot of rotation from the applied force ($m$)

- When the force acts at an angle, we can split it up into its relative horizontal and vertical components to find the effective or perpendicular force.
- Hence, for the example to the right, Torque can be defined by:

\begin{align} \tau = F \times d \sin{\theta} \end{align}

page revision: 1, last edited: 28 Feb 2011 08:51