What is the force required to seprate two glass plates of area `10^-2m^2` with a film of water of thickness 0.05mm between them surface tension of water `72xx10^-3 N/m`?

Explanation

T = W/A or E/A `therefore W = F xx d` = 2TA `
`therefore F = 2TA/d = (2 xx 7 xx 10^-2 xx 3 xx 10^-2)/(0.07 xx 10^-3)`
= `6 xx 10^1` = 60 N