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Problem
Problem
The time taken by a body to slide down a rough
45
∘
45^\circ
4
5
∘
inclined plane is twice that required to slide down a smooth
45
∘
45^\circ
4
5
∘
inclined plane. The coefficient of kinetic friction between the object and rough plane is given by a.
1
3
\frac{1}{3}
3
1
b.
3
4
\frac{3}{4}
4
3
c.
3
4
\sqrt{\frac{3}{4}}
4
3
d.
2
3
\sqrt{\frac{2}{3}}
3
2
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