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The area of a shape is a measure of the 2 dimensional space that it covers. Area is measured in squares - eg square cm, square metres and square km.

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A full bag has more pressure than an empty bag as it covers and fills more area in the bag and has more weight and pressure impacting. The empty bag has hardly any area coverage and has no gravity pressuring the bag as it is light

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Drawing pins have a large round end for your thumb to push. The round end has a large area, so it exerts a low pressure to your thumb. The sharp end has a very small area. The same pushing force produces a high pressure there, so it pushes into the notice board.

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How to calculate pressure for Physics courses

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One Pascal is 1 N/m^2

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Pressure (the effect of a force applied to a surface) is a straight forward unit, obtained from combining base units. The unit of pressure in the SI system is the pascal (Pa), defined as a force of one Newton per square meter.

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Forces can be described as push or pull motion on an object. The SI unit of force is newton, symbol N.

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Pressure depends on the force applied and the area over in which force acts.

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The unit for pressure is Pascal (Pa)

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This is how you convert one unit of pressure to another

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How to convert between a few pressure units. It's fairly simple if you know how to use conversion factors. This video contains a couple of simple examples and a tricky example.

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http://www.bbc.co.uk/education/guides/zssbgk7/revision

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Regular Needles apply more pressure on the surface they are going to be on. This is because their surface area is small. Thick needles apply les pressure in the surface they are. This is because the surface area is bigger and it needs less
pressure applied to function correctly.

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To calculate pressure, you need to know two things:                            1. the force or weight exerted                          2. the surface area over which the force or weight is spread

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To calculate pressure, you need to know two things:                            1. the force or weight exerted                          2. the surface area over which the force or weight is spread

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High heel shoes apply more pressure to the surface they are standing on because the heels have a small surface area. Flats apply less pressure because the surface area is bigger and the whole bottom is on the surface it is standing on.

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Pressure is the effect of a force applied to a surface.

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P = Pressure
F = Force
A = Area
/ = Divide

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Examples of high and low pressure with changing area.

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Examples of high and low pressure with changing area.

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Pressure and force are related, and so you can calculate one if you know the other.