Question: Three people are pulling on a box. The first person is pulling with a force of 100 N at 37 degrees with respect to the positive x-axis. The second person is pulling with a force of 200 N at an angle of -63 degrees with respect to the positive x-axis.
Part A: If the box has zero acceleration find the force that the third person is exerting.
I need help to find the force that the third person is exerting and neglect frictional forces.