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Q.

A body of mass 100g is sliding from an inclined plane of inclination $30 ° .$ What is the frictional force experienced if $μ = 1.7$

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a

$1.7 \times \sqrt{2} \times \frac{1}{\sqrt{3}} N$

b

$1.7 \times \sqrt{2} \times \frac{1}{3} N$

c

$1.7 \times \sqrt{3} \times \frac{1}{2} N$

d

$1.7 \times \sqrt{3} N$

answer is B.

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Detailed Solution

$F_{k} = μ_{k} R = μ_{k} m g \cos θ$

$F_{k} = 1.7 \times 0.1 \times 10 \times \cos 30 ° = 1.7 \times \frac{\sqrt{3}}{2} \times \frac{1}{2} N$

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