Q 11-04-075JEE MainJEE Main 2024 (4 Apr, Shift 2)Easy
A $2\ \text{kg}$ brick begins to slide over a surface which is inclined at an angle of $45^\circ$ with respect to the horizontal axis. The coefficient of static friction between their surfaces is
Answer: (D) $1$
The brick just begins to slide when $mg\sin\theta = \mu_s mg\cos\theta$, i.e. $\mu_s = \tan\theta = \tan45^\circ = 1$.
Solution by Sreeraj P, M.Sc Physics