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# How to distinguish between pressure and force

by：Sure     2021-08-11
Pressure and force are defined separately in the auxiliary units of the International System of Units. Regarding pressure: In the International System of Units, the unit of pressure is Newton per square meter, also known as Pascal (Pa). It is defined as the pressure generated by a force of one Newton acting vertically and uniformly on an area of u200bu200bone square meter. That is, in the flat mode of Pau003dN/m, Pa----Pascal, pressure unit, N----Newton, force unit, m---pressure and force are defined separately in the auxiliary units of the International System of Units . Regarding pressure: In the International System of Units, the unit of pressure is Newton per square meter, also known as Pascal (Pa). It is defined as the pressure generated by a force of one Newton acting vertically and uniformly on an area of u200bu200bone square meter. That is, the square of Pau003dN/m. In the formula, Pa----Pascal, pressure unit, N----Newton, force unit, m---meter, length unit. The pressure often mentioned in engineering technology is actually the pressure in physics. However, most of its definitions are defined by pressure, such as: 1. On page Ⅳ-77 of the book 'Measurement Technology Assessment Outline-Mechanics Measurement Volume' compiled by the former State Administration of Metrology and Measurement Value Transmission Department: 'The definition of pressure is: the pressure acts vertically on a unit area and is evenly distributed on this area. Power.' 2. On page 219 of the book 'Industrial Process Testing Technology' published by the Chinese Society of Instrumentation and Control, the 1992 edition of the Society of Instrumentation and Control, 'Pressure is a force that acts vertically and uniformly on a unit area.' 3. On page 1 of the book 'Terms and Definitions of Pressure Measurement Terms and Definitions' of the National Bureau of Metrology JJG1008-87: '1. Pressure (Pressure) The distributed force acting vertically on a unit area.' It is given in the JJG1008-87 standard. ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? With two units in parallel, pressure is the priority. In engineering technology, pressure is almost always used. Therefore, people who are engaged in instrumentation will say that they use pressure. Because the term pressure has been around for a long time, it can be said to be deeply ingrained, because people’s habits are sometimes difficult. Changes, such as pressure transmitters, are basically not called pressure transmitters by the instrument personnel. About force: The definition of force: The physical concept of force has various interpretations in different scopes, textbooks, and materials. Usually, Newton's second law is used to describe force. That is, Fu003dma where: F---the force acting on the object, m---the mass of the object, a-the acceleration obtained by the object. In the International System of Units, the force value is the derived unit, the unit is Newton (N), which is defined as the force at which an object with a mass of 1 kilogram produces an acceleration of 1 meter per second. In the engineering unit system, force is the basic unit. The unit is kilogram force (kgf), that is, the gravity of an object with a mass of 1 kilogram in a vacuum when the acceleration of gravity is 9.80665 meters per second square second. The force in engineering usually refers to the force value (measuring force).
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