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Why Inertia is so interesting?

  1. Mar 23, 2007 #1

    Many times I have read articles about how strange inertia is and that no theory we have so far can not explain it etc. However I don't see that problem with it. What is so weird on inertia? It seems to me as normal thing that if some reference frame accelerate the particles in this frame are trying to stay with the velocity they had. It's probably because I really have knowledge of classical mechanics only. Please can you help me here and show me why Inertia is so interesting? Thank you.
  2. jcsd
  3. Mar 23, 2007 #2


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    Regulars on here will know what's coming....

    In this forum, whenever someone says "I read somewhere..." or "I heard somewhere...", we would PREFER that you give an exact reference to what this "somewhere" is. Tell us the exact source so that we can double check what you thought you have understood out of it.

    It makes no sense to try and correct or explain what you read without figuring out if what you interpreted is what was being written in the first place. We can't tell if you read some crackpot article, or if you understood something incorrectly, or if the article is pointing out beyond the scope of what one can explain currently.

    I have seen many cases where, after we spend a lot of effort in trying to explain to the reader, it turned out that the reader misinterpreted the article in the first place. So the whole question was moot! I'm sure you can imagine why such a thing can be annoying and frustrating.

    So to prevent that (and this applies to everyone who has the intention of posting such a question), please CITE YOUR SOURCES clearly! If you can't, then it can't be THAT important. Or maybe this would be a good warning in the future for people to SAVE and RECORD your sources whenever you read anything interesting or puzzling.

  4. Mar 23, 2007 #3
    Ok. I'm sorry for that. As you might expected I don't have any certain sources and so I will try to rewrite my question.

    Why is it so hard to explain inertia in terms of modern physics? I'm high school junior so I know only classical mechanics and little bit of special relativity. You probably will want know how I know that it's hard. So the answer is that I heart it. I cannot vindicate it differently. If it is not true just report this topic and I'm sorry for your time.

    I will be glad for any help or link to web about this topic.
  5. Mar 23, 2007 #4
    the problem cmoes when you try to explain why ceratin particles have the masses they do, ie why doesn't a brick have 10000x the amount of inertia it does right now.
  6. Mar 23, 2007 #5


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    Inertia becomes an issue when gravity is considered. Einstein thought about gravitational mass and inertial mass and decided they must be the same.

    Try looking up Mach's principle in Wiki.

    But I'm not sure what you are actually asking.
  7. Mar 24, 2007 #6
    Without inertia, any mass could be accelerated to the speed of light with little difficulty, and that would make for a very strange universe indeed; one which would likely be in constant destructive chaos.
    Just some thoughts...
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