A uniform horizontal beam is hinged at its left end (point A)

PHYSICS · Subjective · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

A uniform horizontal beam is hinged at its left end (point A). Three forces act on the beam: •

15\,\text{N}

downward at

0.50\,\text{m}

from A. •

20\,\text{N}

upward at

1.00\,\text{m}

from A. •

25\,\text{N}

horizontally to the right applied exactly at A. Which of these forces produces zero torque about point A, and why?