A box of mass \( 8 \mathrm{~kg} \) is placed on a rough inclined plane of inclination \( 30^{\ci... VIDEO
A box of mass \( 8 \mathrm{~kg} \) is placed on a rough inclined plane of inclination \( 30^{\circ} \). Its downward motion can be prevented by applying a horizontal force \( F \), then value of \( F \) for which friction between the block and the incline surface is minimum, is (take, \( g=10 \mathrm{~ms}^{-2} \) )
(a) \( \frac{80}{\sqrt{3}} \)
(b) \( 40 \sqrt{3} \)
(c) \( \frac{40}{\sqrt{3}} \)
(d) \( 80 \sqrt{3} \)
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