A ladder of weight ‘w’ rests against a smooth vertical wall, and r – McqOptions

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1.	A ladder of weight ‘w’ rests against a smooth vertical wall, and rests on rough horizontal ground, the coefficient of friction between the ladder and the ground being 1/4. The maximum angle of inclination of the ladder to the vertical, if a man of weight ‘w’ is to walk to the top of it safely, is tan’1 x, where x is___________________?
A.	1/4
B.	1/3
C.	3
D.	4
Answer» C. 3

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