Properties Of Solids And Liquids Question 385

Question: The force required to separate two glass plates of area 102m2 with a film of water 0.05 mm thick between them, is (Surface tension of water is 70×103 N/m)[KCET 2000; Pb. PET 2001: RPET 2002]

Options:

A) 28 N

B) 14 N

C) 50 N

D) 38 N

Show Answer

Answer:

Correct Answer: A

Solution:

Force required to separate the plates F=2TAt=2×70×103×1020.05×103=28N



NCERT Chapter Video Solution

Dual Pane