Question

A body of mass 100 g is sliding from an inclined plane of inclination ${30}^o$. What is the frictional force experienced if $\mu$=1.7

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

$F_k={\mu }_{k}R={\mu }_{k}mgcos\theta$
$F_k=1.7\times 0.1\times 10\times cos{30}^o=1.7\times \frac{\sqrt{3}}{2}N$