Question
A body of mass m is placed on a rough inclined plane of inclination θ and coefficient of friction μ, such that tan θ > μ. Find the acceleration of body down the inclined plane.
Solution
Let a body of mass 'm' be placed on the inclined plane of inclination θ as shown in the figure. Since tan θ > μ.
Therefore,
Body will accelerate in downward direction and is in equilibrium perpendicular to inclined plane.
Now,
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Net force acting on the body in downward direction along the plane is, 
Acceleration of body along inclined plane is,
