0 Question 13 B on pt 0 100 3 99 G) Details Three different forces act on an object. They are: I71 = 3:; 7,2 :3 3:; 3,7 :3 Find the net force F on the object (the sum of the forces} Fmt= Find what fourth force, F4 would need to be added so the object feels no force, that is, so PM; = U F=