The rectangular flashboard MN shown below is 6 m high and pi

The rectangular flashboard MN shown below is 6 m high and pivoted at B What must be the maximum height of B above N if the flashboard is 011 the verge of tipping when the water surface rises to M? Referring to the figure below, what value of b is necessary to keep the rectal

Solution

Solution:

Condition of critical stability

Center of pressure of flashboard immersed vertically from the free surface of the fluid acts at a distance of one third of its length of the flashboard.

Height of B will be h above

h = (1/3)(6)

h = 2.0 m