﻿ A U-shaped wire is dipped in a soap solution, and removed. The thin soap film formed between the wire and a light slider supports a weight of 1.5x10–2N (which includes the small weight of the slider). The length of the slider is 30 cm. What is the surface tension of the film? from Physics Mechanical Properties of Fluids Class 11 Manipur Board

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A U-shaped wire is dipped in a soap solution, and removed. The thin soap film formed between the wire and a light slider supports a weight of 1.5x10–2N (which includes the small weight of the slider). The length of the slider is 30 cm. What is the surface tension of the film?

Given, the thin soap film formed between the wire and slider has two free surfaces.

Weight supported by the light slider = 1.5 $×$ 10-2 N

Length of the slider, L = 30 cm

So, total length of free surface that touches with slider is 2L = 60cm = 0.60 m.

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Any material that can flow is a fluid. Liquids and gases are examples of fluid.

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