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The force required to separate two glass...

The force required to separate two glass plates of area ` 10^(-2) m^(2)` with a film of water 0.05 mm thick between them , is

A

50 N

B

28 N

C

38 N

D

14 N

Text Solution

Verified by Experts

The correct Answer is:
B
`S.T = T =W/(2A) " " :. W = 2TA` ,
` :. F xx d = 2TA`
` :. F = (2TA)/d = (2 xx 70 xx 10^(-3) xx10^(-2))/(5xx10^(-2)xx10^(-3))=28`
` :. ` The force required to separate the plates = 28 N
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