MCQ
A block slides down on incline of angle $30^o$ with an acceleration $\frac{g}{4}$. Find the coefficient of kinetic friction
- A$\frac{1}{{\sqrt 3 }}$
- B$\frac{2}{{\sqrt 3 }}$
- ✓$\frac{1}{{2\sqrt 3 }}$
- DNone
✓
Answer
Correct option: C.
$\frac{1}{{2\sqrt 3 }}$
c
$mg\,\sin \,{30^o} - \mu mg\,\cos \,{30^o} = \frac{{mg}}{4}$
$mg\,\sin \,{30^o} - \mu mg\,\cos \,{30^o} = \frac{{mg}}{4}$
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