What kind of forces would follow only the second part of shell theorem? General expression of a force which would cancel out inside a uniform hollow shell. What about any closed surface?
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1What are you asking? – Jimmy360 Apr 18 '15 at 19:25
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Newton proved that within a spherical shell, one may disregard the gravitational force due to mass of the shell.Garavity here follow s inverse square law . What other hypothetical law could a force follow to achieve the same result? – Apr 18 '15 at 19:33
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you could look at the derivation of shell theorem for this answer.for any irregular body it is simpler to consider it in terms of shells or cylinders and use gauss' law to get field to get force – shrey Jun 02 '15 at 02:25
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Possible duplicate: https://physics.stackexchange.com/q/318135/2451. – Qmechanic Jul 15 '18 at 17:25
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I don't think that there is a general expression but most of the $1/r^2$ proportional following forces are cancelling in a sphere and for electrostatic force they can be cancelled inside any closed conductor where charges can redistribute.
AccidentalFourierTransform
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