A) \[1.7\times \sqrt{2}\times \frac{1}{\sqrt{3}}N\]
B) \[1.7\times \sqrt{3}\times \frac{1}{2}N\]
C) \[1.7\times \sqrt{3}\,N\]
D) \[1.7\times \sqrt{2}\times \frac{1}{3}N\]
Correct Answer: B
Solution :
\[{{F}_{k}}={{\mu }_{k}}R={{\mu }_{k}}mg\cos \theta \] \[{{F}_{k}}=1.7\times 0.1\times 10\times \cos 30{}^\circ \]\[=1.7\times \frac{\sqrt{3}}{2}\times \frac{1}{2}\ N\]
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