Pressure : Pressure is defined as the force or thrust exerted over a unit area.
Pressure plays the same role in fluids as force plays in case of solids. Force is a vector quantity but pressure is a scalar.
The SI unit of pressure is , which is also called pascal (Pa) named after the scientist Blaise Pascal. It is a scalar quantity.
From the formula of pressure, it is clear that the same force can produce different pressures depending on the area over which it acts. The same force acting on a smaller area exerts a large pressure while a force on a larger area exerts small pressure.
Example: Force of 200 N is applied to an object of area . Find the pressure.
Solution : Given,
Now, Pressure,
A sharp knife enable us to cut through things more easily because. | |||
Right Option : B | |||
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A block of mass 4 kg and dimensions 10 cm X 20 cm X 30 cm rests on the floor. If g = 10 m , then the maximum pressure the block can exert on the floor is | |||
Right Option : A | |||
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A deep sea diver may hurt his ear drum during diving because of: | |||
Right Option : C | |||
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