Aircraft Electrical and Mechanical Systems - Case Study ExampleThis is why the name static to distinguish it from other concepts such as dynamic and absolute pressure. Atmospheric pressure reduces height and vice versa. The main explanation for this phenomenon is that Air has weight, and it is this weight exerted on a unit area of a surface that is known as pressure. The atmospheric pressure can be defined as the total force or weight by an air column at a point or area. Moving up means the air column is reducing resulting in less weight due to less air. Therefore, the pressure becomes less, which explains why atmospheric pressure reduces with height. Air presses on us more when at sea level that when on a mountaintop. This because at sea level the air pressure is approximately 14.7 lbs. /in2 and this value reduce as one goes up. Pressure varies significantly as one moves from the earth’s surface upwards to the top of the atmosphere. At higher altitudes, there is less air resulting in less weight and consequently less pressure.
