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Question

Statement 1: Pressure is a vector quantity as it has a direction.

Statement 2: Pressure is a Scalar Quantity.


A

Statement 1 is correct and 2 is incorrect

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B

Statement 1 is incorrect and 2 is correct

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C

Both are correct

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D

Both are incorrect

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Solution

The correct option is B

Statement 1 is incorrect and 2 is correct


Consider a beaker full of water as shown

Now assume a water molecule 'p' in its bulk, which is in equilibrium.

As all nearby molecules are trying to squeeze it [molecule at p] in, it experiences equal pressure from all sides.

Therefore the pressure on a body submerged in a fluid acts from all direction on the body.

To be more clear, now assume a 2-D place as shown, with face are = A

Now what I mean by previous statement is that the pressure on the plate is equal from all sides [considering the thickness as negligible] but the force on upper face of the plate acts vertically downwards and on lower face of the place, it acts vertically upwards.

Hence pressure does not have a direction but the force arising due to it will have a definite direction which is perpendicular to the considered surface area as Force is a vector quantity.


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