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Why do you think it is necessary to define a separate quantity pressure?
Wiki User
∙ 10y ago
Separate from what? From force? - It turns out that considering pressure, rather than force, simplifies many calculations. For example: all parts of a gas or liquid in a closed container have the same pressure. Now if you consider force, that would not be constant, but rather depend on the area in contact: more area = more force in this case. - Now, if you refer to the SI units: you could use the derived units (newtons / square meter) all the time; the reason this unit has a separate name is because it is used very frequently.
Wiki User
∙ 10y ago
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What two pieces of information are necessary in order to define vector quantity?
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define
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