A large shallow wooden container is filled with water. But the container does not crack. A hole is then made on the surface of the container and a long narrow tube is inserted vertically into the container through this hole. The tube is now filled with water. It is seen that the container now cracks. Explain why.

A large shallow wooden container is filled with water. But the contain

1.	A large shallow wooden container is filled with water. But the container does not crack. A hole is then made on the surface of the container and a long narrow tube is inserted vertically into the container through this hole. The tube is now filled with water. It is seen that the container now cracks. Explain why.
Answer» Solution :The thrust EXERTED by the liquid on the bottom of the container depends on the base and the depth of the liquid in, it but not on the quantity of liquid kept in that vessel. In the present PROBLEM, INITIALLY the depth (h) of water in the container was not large before the inclusion of the tube, ALTHOUGH the amount of water in it was large enough. It produced less thrust on the bottom of the container hence the container did not crack. When the narrow tube is filled with water, up to the height (h + H), the water column increases CONSIDERABLY. It exerts a large thrust on the base of the container, and so the container cracks.