Question
Thu November 29, 2012 By:
 

A metal cube is placed in an empty vessel. when water is filled in the vessel so that the cube is completely immersed in water, the force on the bottom of the vessel in contact with the cube will---? 1.Increase 2. decrease' 3.remain the same. 4. become zero.

Expert Reply
Fri November 30, 2012
The force on the bottom of the cube would definitely increase as the weight of water (or water pressure) acts on it, which is directly above the cube. Earlier, due to absence of water the pressure acting on it was due to air and the cube combined. Now, the pressure will be due to the water and the cube, which will be greater.
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