The minimum force required to start pushing a body up a rough (frictional coefficient μ) inclined plane is F1 while the minimum force needed to prevent it from sliding down is F2. If the inclined plane makes an angle θ from the horizontal such that tanθ=2μ then the ratio F1F2 is :
From the Free Body Diagrams, we have
On adding equations 1 and 2, we have
On subtracting equations 1 and 2, we have
Dividing equations 3 and 4, we have
Hence, the answer is OPTION A.