The minimum force required to start pushing a body up a rough (friction coefficient µ) inclined plane is F 1 while the minimum force needed to prevent it from sliding down is F 2 . If the inclined plane makes an angle θ from the horizontal such that tan θ= 2µ then the ratio 
is
Text Solution
Verified by ExpertsThe correct answer is:
C
F 1 = mg sin θ + µmg cos θ
F 2 = mg sin θ – µmg cos θ
= 
= 
= 
= 3.
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