How Does Angular Momentum Affect Local Spacetime Curvature?

Click For Summary
SUMMARY

The discussion centers on the relationship between angular momentum and local spacetime curvature, specifically referencing the behavior of an ice skater as a practical example. It asserts that as the skater pulls in her arms, her rotation accelerates, which corresponds to an increase in local spacetime curvature, as suggested by Einstein's theory that gravity and acceleration are indistinguishable. The question raised is why nearby objects are not drawn into this more curved spacetime, prompting a call for mathematical analysis to explore this phenomenon further.

PREREQUISITES
  • Understanding of angular momentum principles
  • Familiarity with Einstein's theory of general relativity
  • Basic knowledge of spacetime curvature
  • Ability to perform mathematical calculations related to physics
NEXT STEPS
  • Explore the mathematical framework of general relativity
  • Study the concept of spacetime curvature in detail
  • Learn about the effects of angular momentum on gravitational fields
  • Investigate the implications of local spacetime curvature on nearby objects
USEFUL FOR

Physics students, educators, and anyone interested in the interplay between angular momentum and spacetime curvature will benefit from this discussion.

rlance
Messages
1
Reaction score
0

Homework Statement



t seems to me all momentum is angular momentum. An ice skater pulling in her arms will rotate faster, and obversely, extending her arms will slow her rotation. If her arms are extended to the radius of the planet, her rate of spin will slow to unnoticeable (to us), seeming instead to go in a straight line.

If as Einstein concluded, gravity and acceleration are indistinguishable, the spacetime curvature shown as gravity ought also to be observed as we shorten the arms of the ice skater from 4000 miles to 1 meter. She spins faster, and has a correspondingly more curved signature in her local spacetime.

So why aren’t other things close to her “sucked in” to her much more curved spacetime?

Homework Equations







The Attempt at a Solution

 
Physics news on Phys.org
How do you know they are not?
Do the math and see.
 

Similar threads

Replies
9
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
Replies
2
Views
5K
  • · Replies 13 ·
Replies
13
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 2 ·
Replies
2
Views
5K
  • · Replies 11 ·
Replies
11
Views
3K
Replies
1
Views
2K
  • · Replies 23 ·
Replies
23
Views
2K
Replies
6
Views
2K