An 85kg person stands on a lightweight ladder. The floor is rough; hence, it exerts both...

  

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An 85kg person stands on a lightweight ladder. The floor is rough; hence, it exerts both a normal force, ƒ₁, and a frictional force f₂, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, f3. Using the dimensions given in the figure, find the magnitude of f₁,ƒ2, and ƒ3. y x ©2010 Pearson Education, Inc. fi if₂ mg b = 0.70 m f3 a = 3.8 m An 85kg person stands on a lightweight ladder. The floor is rough; hence, it exerts both a normal force, ƒ₁, and a frictional force f₂, on the ladder. The wall, on the other hand, is frictionless; it exerts only a normal force, f3. Using the dimensions given in the figure, find the magnitude of f₁,ƒ2, and ƒ3. y x ©2010 Pearson Education, Inc. fi if₂ mg b = 0.70 m f3 a = 3.8 m