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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A wooden plank of length 1 m and uniform cross-section is hinged at one end to the bottom of a tank as shown. The tank is filled with water upto a height of 0.5 m. The specific gravity of the plank is 0.5. If the angle theta by the inclination of that of that plank makes with the vertical in the equilibrium position ( exclude the case theta = 0 ). Find the value of 1/ cos^2 theta.

A wooden plank of length 1 m and uniform cross-section is hinged at one end to the bottom of a tank as shown. The tank is filled with water upto a height of 0.5 m. The specific gravity of the plank is 0.5. If the angle theta by the inclination of that of that plank makes with the vertical in the equilibrium position ( exclude the case theta = 0 ). Find the value of 1/ cos^2 theta.

A string is holding a solid block below the surface of the liquid as shown in figure. Now if the system is given an upward constant acceleration a then as compared to previous state.