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Calculate the force required to separate...

Calculate the force required to separate the glass plates of area `10^(-2)m^(2)` with a film of water 0.05 mm thickness between them (surface tension of water `=70xx10^(-3)N//m)`)

A

7 N

B

28 N

C

10 N

D

14 N

Text Solution

Verified by Experts

The correct Answer is:
B
`F = (2AT)/d = (2xx10^(-2)xx70 xx10^(-3))/(5xx10^(-5))`
` F = 140/5 = 28` N
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