A thin uniform equilateral plate rests in a vertical plane with one of its vertex A on a rough horizontal floor and another vertex B on a smooth vertical wall. If the coefficient of friction 
, then the least angle 
its base AB can make with the horizontal surface is
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Let us assume that the side-length of the triangle is a, then
Balancing the torque about point A
On solving further we get
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