Page 5 - Pressure 10 class

Verifification of P=F/A

To Prove P = F/A

Proof: Let us consider ‘F’ be the force applied in per unit area of a surface A . Then

according to definition,

Pressure is directly proportional to the force applied.

i.e p α F ………….(i)

And Pressure is inversely proportional to the surface area.

i.e p α 1/A ………….(ii)

Combining relation (i) and (ii) we get,

P α F/A

Or, P = K F/A, where K is a proportionality constant.

When , F= 1 N, A= 1 m , then the pressure exerts is 1pa and k= 1.
2

There fore,P = F/A.

July 30, 2020 Taranath Baral/GC Shiba/Suraj Thapaliya 5