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A ladder is leaning against a vertical wall, and both ends of
the ladder are at the point of slipping. The coefficient of
friction between the ladder and the horizontal surface is
μ₁ = 0.215 and the coefficient of friction between the ladder
and the wall is ₁ = 0.103.
Determine the maximum angle a with the vertical that the
ladder can make without falling on the ground.
α =
H₂
a
H₂
L
X

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