Question

The system in the figure is in equilibrium. A concrete block of mass 230 kg hangs from the end of the uniform strut of mass 31.6 kg. For angles ? = 28.0

Answer 1

We need to find the equilibrium conditions, first the torques about the hinge is equal zero. In order to find the torques, we need the perpendicular distance from the hinge to the cable, let us assume thar L is the strut length. The angle of the cable and the strut is

so

from the above equation we can found the value of T.

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The forces on the horizontal are given by

therefore

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the forces on the vertical are given by

hence,