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An 85kg person stands on a uniform ladder 4.0m long, that weighs 100N, as shown in the figure. The floor is rough; hence, it exerts both a normal force, f1. and a frictional force, , on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, fs. The ladder makes angle of 60.0 with the floor. Find the forces exerted on the ladder when the person is three-fourths of the way up the ladder.
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