Spinning Mass & Spatial distortion

In summary, the Kerr metric predicts that rotating black-holes will exhibit frame dragging, where objects in close proximity will rotate with the black-hole due to the curvature of spacetime. This effect was measured in the Gravity Probe B experiment and also applies to smaller rotating masses, although it is very difficult to measure.
  • #1
Diracs Dad
3
0
Hi, Does a spinning mass affect the spatial/time fabric differently than a non rotating mass?
 
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  • #2
"According to the Kerr metric, such rotating black-holes should exhibit frame dragging, an unusual prediction of general relativity. Measurement of this frame dragging effect was a major goal of the Gravity Probe B experiment. Roughly speaking, this effect predicts that objects coming close to a rotating mass will be entrained to participate in its rotation, not because of any applied force or torque that can be felt, but rather because of the curvature of spacetime associated with rotating bodies. At close enough distances, all objects — even light itself — must rotate with the black-hole; the region where this holds is called the ergosphere."

http://en.wikipedia.org/wiki/Kerr_metric
 
  • #3
Thanks bobby, my next question is since black holes seem to exhibit this effect, do relatively smaller objects cause this type of frame dragging as well, or do we consider the effects to be negligible given their incredibly smaller masses.
 
  • #4
If you look up "Gravity Probe B" you will learn that this satellite did find a miniscule (really small) frame-dragging effect of the rotating earth. So, yes, the same applies to all rotating masses, but it is extremely small and hard or impossible to measure.
 

1. What is a spinning mass?

A spinning mass is an object that rotates around an axis. This rotation creates angular momentum, which is a measure of an object's tendency to keep spinning.

2. How does spinning mass affect space?

Spinning mass creates a phenomenon known as spatial distortion, which is the warping of space and time caused by the mass and its rotation. This distortion is a key aspect of Einstein's theory of general relativity.

3. Can a spinning mass create a black hole?

Yes, a spinning mass with sufficient density and angular momentum can collapse under its own gravity to create a black hole. The rotation of the black hole causes further distortions in space and time.

4. What is frame-dragging in relation to spinning mass?

Frame-dragging is a gravitational effect caused by the rotation of a massive object. It occurs when the rotation of the object "drags" the space-time around it, causing a shift in the orientation of nearby objects.

5. Can spinning mass be used for propulsion in space travel?

There are theories that suggest using the rotation of a spinning mass to create a propulsion system for space travel, but it has not been successfully implemented yet. This concept is still being researched and tested by scientists.

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