Mechanics of Liquids
Chapter III. Mechanics or Liquids. (1) Liquid Pressure (2) Transmission of Liquid Pressure (3) Archimedes ' Principle (4) Density and Specific Gravity MECHANICS OF LIQUIDS (1) The Gravity Pressure of Liquids 35. Pressure of Liquids against Surfaces. —The sight of a great ship, perhaps built of iron and floating on water, causes one to wonder at the force that supports it. This same force is noticed when one pushes a light body, as a cork, under water. It is quite evident in such a case that a force exists sufficient to overcome the weight of the cork so that it tends to rise to the surface. Even the weight of our bodies is so far supported by water that many persons can float. Fig. 17. —Water forces the card against the chimney. The following experiment provides a means of testing this force: If an empty can is pushed down into water, we feel at once the force of the liquid acting against the object and tending to push it upward. It may be noticed also that so l...