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In general pressure is defined as force exerted on a unit area, being so measured in N/m2 that is called Pascal (Pa). There are several other possible measurement units for pressure, like psi (pound on square foot), atmospheres (that is the average pressure of the atmosphere on the earth surface) and so on.

However I suggest to always use SI units (meters, seconds, Pa, N etc..) since this assures to make no errors in formulas due to incompatible measurement units. At last, very small or very large numbers are not more difficult to deal with than numbers in the order of one :-)

When pressure in liquids or gasses is considered, these fluids transmit pressures at the same way in all directions, thus a simple scalar pressure can be defined in each point.

The situation is different in anisotropic materials like crystals, where the pressure in a point depends on the direction due to the particular crustal structure.

Q: Is pressure equal to force over acceleration?

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Work. The force times the distance over which the force is applied is equal to the work. Work is measured in joules.

There is no force of acceleration. Acceleration is the rate at which velocity changes over time. A net force causes acceleration.

There is no force of acceleration. Acceleration is the rate at which velocity changes over time. A net force causes acceleration.

Over the area not volume

That is called pressure. For example, the SI unit for pressure is the Pascal, which is equal to newtons / square meters.

Related questions

What is the result of a force distributed over an area?

Force is equal to mass times acceleration. Mass is equal to density times volume. Acceleration equals to velocity over unit time.

Firstly, force is equal to mass of the object into it's acceleration, so acceleration is not a force.Next, the change in velocity of a body over time is called acceleration, so yes, acceleration does affecta body's velocity.

Work. The force times the distance over which the force is applied is equal to the work. Work is measured in joules.

There is no force of acceleration. Acceleration is the rate at which velocity changes over time. A net force causes acceleration.

Over the area not volume

since force is mass and acceleration the force needed to knock over a bowling depends on the mass of bowling and it acceleration.

That is called pressure. For example, the SI unit for pressure is the Pascal, which is equal to newtons / square meters.

Pressure is not a force. Pressure is force per unit area over which it is applied.

force =mass x acceleration therefore mass = force /acceleration and acceleration = force/mass

Force changes motion, according to Newton's Second Law (force = mass x acceleration). Applying a force over a distance requires work (= energy transfer); in the simplest case, this work is equal to force x distance.