A uniform horizontal beam long has mass

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

Problem

A uniform horizontal beam

2.0\,\text{m}

long has mass

12\,\text{kg}

. It is attached to a wall by a frictionless hinge at its left end and supported by a vertical cable fastened to the beam

1.5\,\text{m}

from the hinge. If the beam remains motionless, determine the tension in the cable. Use

g = 9.8\,\text{m}\,\text{s}^{-2}