Question: A uniform 3.0-m plank weighing 150 N is suspended by vertical ropes at either end. A 410-N child stands 0.80 m from the left end of the plank. By summing the torques about an axis passing through the right end of the plank,
1- Determine the tension in the rope holding the left end of the plank.
Please explain the equations and steps and numbers are used to get the answer. Thanks!