Fluid Mechanics Viscosity Question 388
Question: The force required to take away a flat circular plate of radius 2 cm from the surface of water, will be (the surface tension of water is 70 dyne/cm) [Pb. PET 2001]
Options:
A) $ 280\pi ,dyne $
B)$ 250\pi ,dyne $
C) $ 140\pi ,dyne $
D)$ 210\pi ,dyne $
Show Answer
Answer:
Correct Answer: A
Solution:
Force required, $ F=2\pi rT=2\pi \times 2\times 70=280\pi .Dyne $
BETA
