what total force is exerted on the inside surface of the bottom of the tank?

If the fluid exerts a force with an upward component on both walls, and neither the walls nor the fluid is in motion, we know from Newton's Third Law that the walls exert a force with a downward component on the fluid, which must transmit this force as an increase in apparent weight to the bottom of the container.

What can we infer about the direction of the net force on the side walls of each container caused by fluid pressure? Let us calculate the pressure exerted on the bottom by the weight of the fluid.Pressure at any given point points equally in all directions. Its bottom supports the weight of the fluid in it. The difference is that water is much denser than air, about 775 times as dense.Ĭonsider the container in Figure 1.

You may notice an air pressure change on an elevator ride that transports you many stories, but you need only dive a meter or so below the surface of a pool to feel a pressure increase. In this case, the pressure being exerted upon you is a result of both the weight of water above you and that of the atmosphere above you. Under water, the pressure exerted on you increases with increasing depth. This pressure is reduced as you climb up in altitude and the weight of air above you decreases. At the Earth’s surface, the air pressure exerted on you is a result of the weight of air above you. If your ears have ever popped on a plane flight or ached during a deep dive in a swimming pool, you have experienced the effect of depth on pressure in a fluid.

Calculate density given pressure and altitude.Explain the variation of pressure with depth in a fluid.

What total force is exerted on the inside surface of the bottom of the tank?