Question

what is the force exerted if the pressure of 20Pascal is acting as a surface of area 25 metre square
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Answer 1

Given :-

Pressure acting = P = 20 Pa

Area = 25 m²

As we know that, Pressure is directly proportional to Force acting and inversely proportional to the area. It means that if force is more pressure will be more and vice-versa. And if area is more pressure will be less and vice-versa.

Using this,

P ∝ F ----(1)

P ∝ 1/A ----(2)

From these two variations.

P = F/A

20 Pa = F/25 m²

F = 20 × 25

F = 500 N

Hence,

The Force acting on body = F = 500 N

Answer 2

Pressure Exerted = 20 Pa

Surface Area = 25 m²

Let force acting be = F

We know,

$P = \frac{F}{A}$

$\therefore F = A \times P$

$\implies F = (25 m^2)(20 N{m}^{-2})$

$\implies F = 25 × 20 N$

$\implies F = 500 N$. $\tt{(Ans.)}$

∴ Force acting was of 500 N.