Since pressure and surface area are inversely related, an object of a smaller surface area generates a higher pressure than a larger object. Using this data, pressure can be calculated as follows: The surface area that the object makes with the wall is 0.0008 m 2. Here is an example of how pressure is measured in pascal.Ĭonsider an object being pushed against a wall with a force of 400 N. A principle in fluid mechanics, it states that a change in pressure in a fluid creates the same change everywhere within the body of the fluid. Larger pascal units are expressed as follows:īlaise Pascal is also the namesake behind the well-known Pascal's law, which is used to develop hydraulic systems. Reduced to base units in SI, 1 Pa is 1 kilogram per m/s 2 - that is, 1 Pa = 1 kg x m -1 x s -2. 1 Pa = 1 N / m 2 = 1 N x m -2 or 1 N per m 2.If F is measured in newtons and A in square meters, a pascal can be expressed as the following: ![]() In mathematical terms, pressure can be expressed as the following: SI accepted it as the standard unit of pressure in 1971 and named it after Blaise Pascal. Specifically, a pascal measures the pressure applied by 1 N of force applied on an area of 1 m 2 at a right angle. In the meter-kilogram-second system, it is expressed in pascals. ![]() Pressure is the force applied over an area. ![]() For most engineering problems, the unit is too small to properly represent pressure or stress, which is why it is often expressed in its multiples, like the kilopascal (kPa), megapascal (MPa), millibar (100 Pa), etc. The pascal is also used to measure stress, specifically tectonic stress in the Earth's plates. One pascal is equivalent to 1 newton (N) of force applied over an area of 1 square meter ( m 2). It is named after the scientist and mathematician Blaise Pascal. The pascal (Pa) is the unit of pressure or stress in the International System of Units ( SI).
0 Comments
Leave a Reply. |