Find the attraction force between two parallel glass plates separated by a distance h = 0.10 mm, after a water drop of mass m = 70 mg was introduced between them. The wetting is assumed to be complete.
Text Solution
Verified by ExpertsThe correct answer is:
CHECK THE SOLUTION.
[F ≈ 2 α m/ ρ h 2 = 1.0 N]
Sol. Normal rxn at surface N = 
.
If wetting is complete cos θ = 1 ⇒ N =
Hence V = m/p ⇒ N = 
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