A rectangular block is `5 cm xx 5 cm xx 10 cm` in size. The block is floating in water with 5 cm side vertical. If it floats with 10 cm side vertical, what change will occur in the level of water?

Options

A. No change
B. It will rise
C. It will fall
D. It may rise or fall depending on the density of blook

Answer

A

Explanation

A body will be in equilibrium only, if the resultant of all the forces and couples acting on the body is zero. If W and w act along different lines, they will form a couple which will tend will form a couple which will tend to rotate the body. Thus, a floating body can be in equilibrium, if no couple acts on it. It will be so, if the line of action of W and w is along the same vertical straight line. Here, in both the situations, as the mass of floating mass of volume of water displaced also remain same in both the cases.