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Question

Physics Question on mechanical properties of fluid

Calculate the force required to separate the glass plates o f area 10−2 m210^{-2}\,m^2 with a film of water 0.05 mm thickness between them (surface tension of water = 70×103N/m70 \times 10^3 N/m)

A

28 N

B

112 N

C

5.6 N

D

11.2 N

Answer

28 N

Explanation

Solution

F=2TAdF = \frac{2TA}{d}