We can solve this problem using torques. The torque is the perpendicular to the lever component of force times distance from the point of rotation to the force:
Something is in equilibrium (does not move, break or rotate) when the net (total) torque is zero, i.e.
Torques counter-clockwise are positive and they are negative when directed clockwise.
Now choose a point around which we will calculate the torques. Let it be the point O:
The force of gravity, if we deal with a uniform boom, is applied at the center of the rod.
If you know the angle between the cable and the rod or the wall, simply use sine or cosine correspondingly to calculate the tension .
Comments
Leave a comment