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Pressure facts for kids

Kids Encyclopedia Facts
Pressure force area.svg

Pressure means how much force something is pushing on something else with. It is expressed as force acting per unit area:

P = F / A

(Pressure = Force divided by Area that force is acting on)

Pressure is directly proportional to force and inversely proportional to area, so the same amount of force applied by a hand will produce less pressure than when applied by something smaller, like a finger.

Pressure is also related to density. If a solid or a fluid is more dense, it has a larger weight, and therefore exerts a larger force, over the same area.

The standard unit of pressure is the Pascal (Pa) named after French physicist Blaise Pascal, who did much work on pressure. 1 pascal = a force of 1 newton per square meter.

Atmospheric pressure is the pressure exerted by oxygen and other molecules (the atmosphere basically) on a body/point/area. Atmospheric pressures is measured using instruments such as the barometer which uses the principles of pressure and vaccum to measure the atmospheric pressure.

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Pressure Facts for Kids. Kiddle Encyclopedia.