A uniform rod long is hinged to a vertical wall at its upper end and supports a sign…

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

Problem

5.0\,\text{kg}

uniform rod

0.80\,\text{m}

long is hinged to a vertical wall at its upper end and supports a

15\,\text{kg}

sign that hangs from its outer (lower) end. A cable is attached from the outer end of the rod to the wall so that the cable makes an angle of

30^{\circ}

above the rod. If the rod is horizontal and the system remains at rest, determine the tension in the cable. Use

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