A block kept on a rough surface starts sliding when the inclination of the surface is ' θ ' with respect to the horizontal. The coefficient of static friction between the block and the surface is
Text Solution
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Free body diagram for the given scenario is shown in the figure.
Forces normal to the plane are balanced as the block cannot move normal to the plane.
… ..(i)
When the body just begins to slide, forces parallel to the plane are balanced.
..(ii)
Frictional force acting when the body just begins to slide is given by:
.(iii)
Substituting (i) & (iii) in (ii), we get
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