If a section of a soap bubble of radius r by a plane through its centre is considered
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Step-by-step explanation:
Two forces are acting in the right half of the bubble, which we shall look to, at the free-body diagram.
We have that a force is exerted on the right half of the bubble, due to the force applied in the surface in the film which is suffering tension, by the left half.
Along the circular edge of the hemispherical film, we can say that points are forced by tension the the left.Hence, we have that the product of the circumference (2 x pi x R) of the circular edge with surface tension T is the magnitude of the force caused by each surface of the film.
2T(2 x pi x R) is the total force caused by the inner and outer surfaces
Where the tension of the surface is T, and the radius of the bubble is R.
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