Properties of Matter 4 Question 15
17. A container of width is filled with a liquid. A thin wire of weight per unit length is gently placed over the liquid surface in the middle of the surface as shown in the figure. As a result, the liquid surface is depressed by a distance . Determine the surface tension of the liquid.
(2004, 2M)
Show Answer
Answer:
Correct Answer: 17.
Solution:
- Free body diagram of the wire is as shown in figure.
Considering the equilibrium of wire in vertical direction, we have
Substituting the values in Eq. (i), we get