Angular momentum, torque and eccentricity

  • #1
StephenPrivitera
363
0
How is eccentricity of an orbit affected by the angular momentum of the orbiting body (mathematically, that is)? How does torque affect angular momentum? How is a torque exerted? What is a torque?
 

Answers and Replies

  • #2
selfAdjoint
Staff Emeritus
Gold Member
Dearly Missed
6,881
10
Originally posted by StephenPrivitera
How is eccentricity of an orbit affected by the angular momentum of the orbiting body (mathematically, that is)? How does torque affect angular momentum? How is a torque exerted? What is a torque?

All of the following is at the level of Newton-Kepler orbits.


Angular momentum does not affect the eccentricity, or vice versa. The eccentricity does not change greatly, unless there are tidal effects. Angular momentum is conserved. They interact to cause the planet's speed to vary according to Kepler's second law: A radius vector from the planet to the sun sweeps out equal areas in equal times.

Torque is twisting force, given by a force acting on a lever arm, or equivalent. You can use torque to develop Keplerian orbits, and there used to be a website that did this, but I have lost the link.
 

Suggested for: Angular momentum, torque and eccentricity

Replies
2
Views
657
  • Last Post
Replies
2
Views
179
Replies
23
Views
1K
  • Last Post
Replies
7
Views
1K
  • Last Post
Replies
13
Views
2K
  • Last Post
Replies
5
Views
2K
Replies
31
Views
3K
  • Last Post
Replies
24
Views
2K
Replies
5
Views
1K
Top