Q.
A wooden plank of length $1 m$ and uniform cross-section is hinged at one end to the bottom of a tank as shown in figure. The tank is filled with water up to a height of $0.5 m$. The specific gravity of the plank is $0.5 .$ Find the angle $\theta$ that the plank makes with the vertical in the equilibrium position.
Mechanical Properties of Fluids
Solution: