A body takes time t to reach the bottom of an inclined plane of angle θ with the horizontal. If the plane is made rough, time taken now is 2t. The coefficient of friction of the rough surface is

(1) $\frac{3}{4}\mathrm{tan}\theta$

(2) $\frac{2}{3}\mathrm{tan}\theta$

(3) $\frac{1}{4}\mathrm{tan}\theta$

(4) $\frac{1}{2}\mathrm{tan}\theta$

Concept Videos :-

#16-Static-Friction-Force
#17-Solved-Examples-8
#18-Solved-Examples-9
#19-Solved-Examples-10
#20-Kinetic-Friction-Force
#21-Solved-Examples-11

Concept Questions :-

Friction
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