Problem

Let a force F be acting on a body free to rotate about a point *O* and let r the position vector of any point *P* on the line of action of the force. Then torque (

\tau

) of this force about point *O* is defined as

\tau = \mathbf{r} \times \mathbf{F}

Given,

\mathbf{F} = (2\hat{i} + 3\hat{j} - \hat{k}) \text{ N}

and

\mathbf{r} = (\hat{i} - \hat{j} + 6\hat{k}) \text{ m}

Find the torque of this force.

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