Torque equation:

$\overline{){\mathit{\tau}}{\mathbf{=}}{\mathit{r}}{\mathit{F}}{\mathbf{sin}}{\mathit{\theta}}}$ where θ is the angle between r and F.

Στ = τ_{bar} + τ_{worker}

A 4m, 500kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. a 70kg worker stand at the far end of the beam. What is the magnitude of the torque about the point where the beam is bolted into place.

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