Define pressure. What is the relation between pressure, force and area? State the units in which pressure is measured.

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Solution

Pressure is defined as the force acting per unit area.
The relation between pressure, force and area:
$P r e s s u r e = \frac{F o r c e}{A r e a}$ .
Units:
SI unit of pressure is $P a s c a l .$
Other units of pressure include torr, bar, mm of Hg, etc.

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