Hey Kids,
This post is for standard 9th students.You must be having chapter of pressure in mechanics and as of now you must have become familiar with the terms scalar and vector.If a quantity can be defined completely using only magnitude it is scalar and if direction is also required apart from magnitude then it is vector.By the definition of pressure it is Force acting per unit area.Here what happens is that no matter where you apply the pressure,its effect will be taken by the perpendicular component of that force acting on unit area.Since here it is predefined that you should take only the perpendicular component so you don't have to worry about direction.Your books might not contain above facts as these are more precisely defined in 11th standard.For the time being just know that it is scalar as it force will be perpendicular to area.You will know about vector additions,multiplications,divisions and triangle rule in higher classes.Then it will become more clear.
Thanks...
This post is for standard 9th students.You must be having chapter of pressure in mechanics and as of now you must have become familiar with the terms scalar and vector.If a quantity can be defined completely using only magnitude it is scalar and if direction is also required apart from magnitude then it is vector.By the definition of pressure it is Force acting per unit area.Here what happens is that no matter where you apply the pressure,its effect will be taken by the perpendicular component of that force acting on unit area.Since here it is predefined that you should take only the perpendicular component so you don't have to worry about direction.Your books might not contain above facts as these are more precisely defined in 11th standard.For the time being just know that it is scalar as it force will be perpendicular to area.You will know about vector additions,multiplications,divisions and triangle rule in higher classes.Then it will become more clear.
Thanks...
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