Question

How much force should be applied on a 100cm sq.m. area using pressure of 25 pascal

Answer 1

The applied force = 0.25 N

Given:

Measurement of Area = 100 cm²

Pressure applied = 25 pascal

To find:

Force should be applied on a 100 cm² area using pressure of 25 pascal

Solution:

Given area = 100 cm²

Convert 100 cm² into m²

⇒ 100/10000 = 0.01 m²  

The formula for applied for on a given area to get required amount  of pressure of is given by    

                 F = PA    

Where,

P = The amount of pressure that we get on given area and A = area  

Applied Force = 0.01 m²  × 25 pascal = 0.25 N

The applied force = 0.25 N

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Answer 2

Answer: 252.5 kg-N

Explanation:

Given: Area as 100 sq.m.

Pressure as 25 pascal

To find: Force should be applied to the setup.

Solution: From the very basics we know that there is a relation between pressure, force, and area

And the relation is

$Pressure=Force/Area$.......(1)

Now let the pressure be P, Area be A, and Force be F as per normal convention

Now from the question language, we can easily understand that A=100sq.m. P=25 pascal and F=?

Use equation (1) and put the values in equation (1) of pressure and area to find the unknown element that is the force

Before that first convert the given pressure in kg-F/sq.m.

$1pascal=0.101 kg-F/sq.m$.

Hence $25 pascal=25*0.101=2.525 kg-F/sq.m.$

Now use the equation (1) for the question

$2.525 kg-F/sq.m.=F/100$

On solving we get$F=252.5kg-F or 252.5 kg-N$ where N is in Newton

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