Answer to Question #346629 in Physics for Jerry

Question

A boulder is moved by applying force to two ropes that are tied to it. The forces 120 lb towards the

west and 150 lb towards south . What is the net force applied to the boulder?

Answer 1

The net force

$$F=\sqrt{F_x^2+F_y^2}=\sqrt{120^2+150^2}=192\:\rm lb$$