Question

How pressure depends on area ?explain with the help of an example?

Answer 1

Pressure is inversely proportional to area.

Hammer a box into wall and try same with a sharp nail.

The sharp nail will exert grater pressure due to less area of contact.

And gets penetrated into the wall more easily...

.

What about the box..

I think no need to tell wheather it will get into wall or not!!!

It will not exert sufficient pressure and thus donesnt get into it.!!!

Hope it helps..

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I need one braiest ans to upgrade my rank...plez

Answer 2

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WHAT IS PRESSURE:-

Pressure is defined as the force applied perpendicular to the surface per unit area.

In other words :-

$pressure = \frac{force}{area}$

OR

pressure = F/A.

SI unit of pressure is Pascal or Pa.

RELATION OF PRESSURE WITH AREA:-

Pressure is inversely proportional to the area.

Hence , if area is increased , the pressure is decreased and if area is

area is decreased , the pressure is increased.

EXAMPLE:-

Let force applied by a box be 10N .

and , let it be first placed on area of 10m² and then it be shifted on area of 5m².

Now,

for first case when a box is placed on area of 10m²

pressure = F/A

=10/10

= 1 Pa

and, for second case when a box is placed on area of 5m²

pressure = F/A

= 10/5

= 2 Pa

HENCE, we conclude that when a box was on an area of 10m² the pressure exerted by it was 1Pa and when it was shifted on an area of 5m² the pressure exerted by it was 2Pa.

Therefore, it is justified that pressure is inversely proportional to the area