QJEEAdv16Ph04a1: JEE Advanced 2016 Physics - Class 11 JEEAdv16Ph04a1 Solution: A uniform wooden stick of mass 1.6 kg and length rests in an…

A uniform wooden stick of mass 1.6 kg and length $l$ rests in an inclined manner on a smooth, vertical wall of height h ( < $l$ ) such that a small portion of the stick extends beyond the wall. The reaction force of the wall on the stick is perpendicular to the stick. The stick makes an angle of $30^\circ$ with the wall and the bottom of the stick is on a rough floor. The reaction of the wall on the stick is equal in magnitude to the reaction of the floor on the stick. The ratio ${h \over l}$ and the frictional force f at the bottom of the stick are ( g =10 ms^-2 )