Question

I two forces in the ratio 5:7 act in two areas 4:5 . Find the ratio of pressure exerted .

Answer 1

Given :
Let the force be F1 and F2.
F1=5x and F2=7x
let area A1=4x
let area A2=5x
pressure P1=F1/A1
=5x/4x=5/4 Pas
Pressure P2=F2/A2
=7x/5x=7/5 pas
P1/P2=5/4/7/5=25/28
∴ratio of pressures are 25: 28