Q: A ladder of mass M and length L is supported in equilibrium against a smooth vertical wall and a rough horizontal surface, as shown in figure. If θ be the angle of inclination of the rod with the horizontal, then normal reaction of the ground on the ladder

(a) $ \displaystyle \frac{2}{3} M g $

(b) $ \displaystyle \frac{1}{2} M g $

(c) $ \displaystyle \frac{1}{3} M g $

(d) $ \displaystyle M g $

Ans: (d)