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QUESTION

An 90 kg person stands on a uniform 7.6 kg ladder that is 4.0 {\rm m} long, as shown in the figure .

An 90 kg person stands on a uniform 7.6 kg ladder that is 4.0 {rm m} long, as shown in the figure . The floor is rough; hence, it exerts both a normal force, f_1, and a frictional force, f_2, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, f_3.

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