A square metal plate 2.5m on each side is pivoted about an axis though point O at its center and perpendicular to the plate. Calculate the net torque due to the three forces if the magnitudes of the forces are F1=18N, F2=20N, and F3=11N..

Complete Question

The diagram for this question is shown on the first uploaded image

The net torque  

Explanation:

   From the question we are told that

      The length of each side is  

       The first force is  

        The second force is  

         The third force is

The free body diagram for the question is shown on the second uploaded image

  Generally torque is mathematically represented as

 Where is the torque

             r is  the length from the rotating point to the point the force is applied, this is also the radius of the circular path made

             F is the force causing the rotation.

looking at the free body diagram we can deduce that L is the diameter of the circular path made as a result of toque

       Now  for the torque due to force

The negative sign is because the direction of    is clockwise

     =>  

Substituting value

The torque as a result of the second force is  mathematically evaluated as

The torque as a result of the third  force is  mathematically evaluated as

Where the free body diagram

The net torque the mathematically

substituting value

im not to sure what it is