I have the solution for the problem. I just don't understand HOW this formula was derived. It came from another student, and nowhere in the text has our teacher taught us how do something like this.. 1. The problem statement, all variables and given/known data http://loncapa2.physics.sc.edu/res/sc/gblanpied/courses/usclib/joneslib/jonespictures/jonesf4_43.gif What is the force exerted by the string on the wall at point A in the figure if the suspended fish has mass m = 0.56 kg? 2. Relevant equations m * g * (Square root of 3) 3. The attempt at a solution .56 * 9.81 * (square root of 3) = 9.52 N .. but why would you use the square root of 3 here? 30 degrees?