In Two Respects- - an Astronomy Net Blackholes Forum Message

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In Two Respects-

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Posted by Joe Antognini on June 17, 2002 23:51:03 UTC

If you mean 'speed of gravity' in the sense of how fast one gets pulled to the ground, then here is your answer. In a free fall plane, the plane is moving at the speed of gravity with no energy exerted by the plane. However, if the plane pointed downward and turned on the propellers, it would go faster- in other words, faster than the speed of gravity. Needless to say, it might hurt when contact with ground is made, but it proves the point that you wouldn't be able to go through the Earth by moving faster than the speed of gravity (Unless you broke through everything). However, in the case of a black hole, at the event horizon the speed of gravity is the speed of light. As nothing can travel faster, at this point (when you are still in the universe) you cannot go any faster (though you may be able to on the other side of the event horizon). So, you would probably end up like all objects that fall in- squished.
In the other sense of the term, it could mean how fast gravity affects other objects. in this case, I believe that gravity moves at the speed of light. So, it would be impossible to escape it in that sense. I'm not sure if I have actually answered your question, so if I haven't then please reply.

Follow Ups:

Faster than the speed of light - yanniru - June 18, 2002 - 13:47 UTC
- fastr than the speed of light #2 - kstumpf2002 - July 10, 2002 - 21:19 UTC
- No - kc4ixa - July 11, 2002 - 12:17 UTC
  - Please explain - yanniru - July 11, 2002 - 19:27 UTC
    - OK - kc4ixa - July 11, 2002 - 20:09 UTC
      - cosmic speed limit - fasteddy - July 11, 2002 - 22:43 UTC
        
        Hmmm. - kc4ixa - July 12, 2002 - 12:49 UTC
        
        11 dimensions - fasteddy - July 13, 2002 - 03:56 UTC
        
        11 dimensions and all that - mathman - July 14, 2002 - 02:59 UTC
        
        An Honor - fasteddy - July 13, 2002 - 04:07 UTC
        
        gravitons are still theoretical - finlearson - July 26, 2002 - 00:03 UTC
        
        Gravity - fasteddy - July 27, 2002 - 17:29 UTC
"Event Horizon" - fasteddy - June 19, 2002 - 02:18 UTC

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