Newton's Law of gravitation using kepler's laws.

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SUMMARY

The discussion focuses on deriving Newton's Law of Gravitation using Kepler's Laws of planetary motion. The key equations involved include Kepler's law equations and the second time derivative of the radius vector, expressed as -4c²/(lr²) + 4c²/r³. The derivation process involves manipulating these equations to isolate the effects of centrifugal acceleration, ultimately leading to the formulation of Newton's Law. The participant seeks clarification on the role of centrifugal acceleration in this derivation.

PREREQUISITES
  • Understanding of Kepler's Laws of planetary motion
  • Familiarity with calculus, specifically second derivatives
  • Knowledge of gravitational forces and acceleration concepts
  • Basic proficiency in solving differential equations
NEXT STEPS
  • Study the derivation of Kepler's Laws from observational data
  • Learn about the mathematical formulation of centrifugal acceleration
  • Explore the relationship between gravitational force and centripetal force
  • Investigate advanced topics in orbital mechanics and perturbation theory
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Students of physics, particularly those studying classical mechanics, educators teaching gravitational theories, and anyone interested in the mathematical foundations of celestial mechanics.

Sourabh N
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Homework Statement



Derive Newton's Law of gravitation using kepler's laws.

Homework Equations



Kepler's law equations.
etc.

The Attempt at a Solution



l= r(1- e*cos(theta)) l- const. e- eccentricity
Solving these equations using kepler's laws (r^2(d(theta)/dt), etc.)

second time derivative of r = -4c^2/(lr^2) + 4c^2/r^3
subtracting centrifugal acc. (4c^2/r^3) from it I get Newton's law.

But I don't know how the centrifugal acc. come here.
 
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