Prove Impossible to Orbit Earth in <80 Minutes

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SUMMARY

The discussion centers on proving that it is impossible to orbit Earth in less than 80 minutes, referencing the principles of physics, specifically Newton's laws of motion. Participants emphasize the use of the formula F = ma to analyze circular motion and gravitational forces. The Cavendish experiment is mentioned as a foundational concept for understanding gravitational interactions, although it is not directly related to orbital mechanics. The conclusion is that achieving an orbit in under 80 minutes contradicts established physical laws governing gravitational forces and orbital velocity.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with gravitational force calculations
  • Knowledge of circular motion dynamics
  • Basic algebra for physics applications
NEXT STEPS
  • Study the derivation of orbital velocity equations
  • Learn about gravitational force and its impact on orbital mechanics
  • Explore the implications of the Cavendish experiment on gravitational theory
  • Research the concept of escape velocity and its relation to orbital periods
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Physics students, educators, aerospace engineers, and anyone interested in understanding the mechanics of orbital motion and gravitational forces.

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"Describe the objective, apparatus, and results of the cavendish expirment?"
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Question2: Prove (using algebra) that it is impossible to go around (orbit around) Earth in less than 80 min..

I honestly have never heard of this... can some one explain it to me? or give me some links about it?
 
Physics news on Phys.org
re Cavendish expt just search on the web.
re 2nd part:
Do you know how to use F = ma for an object going in circular orbit about the Earth?
 

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