Gravitation attraction of inner portion problem

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SUMMARY

The discussion centers on the gravitational attraction of a thin spherical layer within a uniformly dense sphere, specifically addressing Newton's Shell Theorems. It is established that only the mass located within the spherical layer exerts gravitational force on it, while the mass outside does not influence the layer's attraction. This conclusion is derived from the principles outlined in Newton's Shell Theorems, which clarify the behavior of gravitational forces in spherical distributions of mass.

PREREQUISITES
  • Understanding of Newton's Shell Theorems
  • Basic concepts of gravitational force
  • Familiarity with spherical symmetry in physics
  • Knowledge of uniformly dense spheres
NEXT STEPS
  • Study Newton's Shell Theorems in detail
  • Explore gravitational force calculations in spherical coordinates
  • Investigate applications of gravitational theories in astrophysics
  • Learn about the implications of spherical symmetry in gravitational fields
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Students of physics, educators teaching gravitational concepts, and anyone interested in the mathematical foundations of gravitational attraction in spherical bodies.

mooncrater
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Homework Statement


While solving a question on gravitation I had to consider a very thin spherical layer of a uniformly dense sphere. It's written in the solution that :
"Then the considered layer is attracted to the part of the sphere lying within it (outer part doesn't act on the layer)

Homework Equations

The Attempt at a Solution


I have problem in the bold part. Why won't the upper part not attract the layer? Why only the inner layer will do so?
 
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Look up Newton's Shell theorems.
 
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