Notices
Results 1 to 17 of 17

Thread: Deceleration due to Electromagnetism

  1. #1 Deceleration due to Electromagnetism 
    Forum Bachelors Degree x(x-y)'s Avatar
    Join Date
    Jul 2010
    Location
    UK
    Posts
    462
    Quick question:

    As gravity has a strength of that of electromagnetism, assuming air resistance is negligible, would I be right in saying that if you were to jump off a tower accelerating down at g (~ 9.81 m/sē) then would your deceleration upon impacting the ground be times larger than the acceleration due to gravity? If so, then I suppose gravity is pretty safe, but electromagnetism on the other hand... :-D

    Thanks in advance.


    "Nature doesn't care what we call it, she just does it anyway" - R. Feynman
    Reply With Quote  
     

  2.  
     

  3. #2 Re: Deceleration due to Electromagnetism 
    . DrRocket's Avatar
    Join Date
    Aug 2008
    Posts
    5,486
    Quote Originally Posted by x(x-y)
    Quick question:

    As gravity has a strength of that of electromagnetism, assuming air resistance is negligible, would I be right in saying that if you were to jump off a tower accelerating down at g (~ 9.81 m/sē) then would your deceleration upon impacting the ground be times larger than the acceleration due to gravity? If so, then I suppose gravity is pretty safe, but electromagnetism on the other hand... :-D

    Thanks in advance.
    You are comparing the electromagnetic force between charged particles to the gravitational force between neutral bodies. Apples and oranges.


    Reply With Quote  
     

  4. #3 Re: Deceleration due to Electromagnetism 
    Forum Bachelors Degree x(x-y)'s Avatar
    Join Date
    Jul 2010
    Location
    UK
    Posts
    462
    Quote Originally Posted by DrRocket
    Quote Originally Posted by x(x-y)
    Quick question:

    As gravity has a strength of that of electromagnetism, assuming air resistance is negligible, would I be right in saying that if you were to jump off a tower accelerating down at g (~ 9.81 m/sē) then would your deceleration upon impacting the ground be times larger than the acceleration due to gravity? If so, then I suppose gravity is pretty safe, but electromagnetism on the other hand... :-D

    Thanks in advance.
    You are comparing the electromagnetic force between charged particles to the gravitational force between neutral bodies. Apples and oranges.
    I don't see your point- all contact forces are electromagnetic forces, are they not? So the contact force with the ground is due to electromagnetism. It is a valid situation.
    "Nature doesn't care what we call it, she just does it anyway" - R. Feynman
    Reply With Quote  
     

  5. #4 Re: Deceleration due to Electromagnetism 
    . DrRocket's Avatar
    Join Date
    Aug 2008
    Posts
    5,486
    Quote Originally Posted by x(x-y)
    Quote Originally Posted by DrRocket
    Quote Originally Posted by x(x-y)
    Quick question:

    As gravity has a strength of that of electromagnetism, assuming air resistance is negligible, would I be right in saying that if you were to jump off a tower accelerating down at g (~ 9.81 m/sē) then would your deceleration upon impacting the ground be times larger than the acceleration due to gravity? If so, then I suppose gravity is pretty safe, but electromagnetism on the other hand... :-D

    Thanks in advance.
    You are comparing the electromagnetic force between charged particles to the gravitational force between neutral bodies. Apples and oranges.
    I don't see your point- all contact forces are electromagnetic forces, are they not? So the contact force with the ground is due to electromagnetism. It is a valid situation.
    Only if you think that the gravitational force is dominated by the force due solely to electron rest mass.
    Reply With Quote  
     

  6. #5  
    Forum Bachelors Degree x(x-y)'s Avatar
    Join Date
    Jul 2010
    Location
    UK
    Posts
    462
    No, all I'm asking, essentially (but applied to a random situation), is whether acceleration due to electromagnetism is times larger than the acceleration due to gravity seeing as electromagnetism is this same magnitude stronger than gravity as a force?
    "Nature doesn't care what we call it, she just does it anyway" - R. Feynman
    Reply With Quote  
     

  7. #6  
    . DrRocket's Avatar
    Join Date
    Aug 2008
    Posts
    5,486
    Quote Originally Posted by x(x-y)
    No, all I'm asking, essentially (but applied to a random situation), is whether acceleration due to electromagnetism is times larger than the acceleration due to gravity seeing as electromagnetism is this same magnitude stronger than gravity as a force?
    Electromagnetism is NOT 10^35 times as strong as gravity.

    The repulsive force between two electrons is 10^35 (Ithink it is even larger but that is not the point) times the gravitational attraction. But the gravitational force between two neutrons is much larger than the electromagnetic force.
    Reply With Quote  
     

  8. #7  
    Forum Bachelors Degree x(x-y)'s Avatar
    Join Date
    Jul 2010
    Location
    UK
    Posts
    462
    Oh, then I have not been reading entirely accurate sources (or they just didn't explain it well).
    "Nature doesn't care what we call it, she just does it anyway" - R. Feynman
    Reply With Quote  
     

  9. #8  
    Time Lord
    Join Date
    Mar 2007
    Posts
    8,035
    x(x-y) I think your mistake is comparing dissimilar sources for the force. The Earth is a really big gravitational force. The strength of that force drops off according to 1/(r^2), but since the mass is so great, the amount of force exerted by gravity is about the same at the top of the building as it is at the bottom.

    The electromagnetic force between the first 1 meter of concrete you crash into and your body has to act against quite a lot of accumulated velocity by the time you reach it, and get close enough for it to start being strong.
    Some clocks are only right twice a day, but they are still right when they are right.
    Reply With Quote  
     

  10. #9 levitation and new discoveries about particles. 
    New Member
    Join Date
    Oct 2011
    Posts
    1
    If rats can be levitated with electromagnetics and defy gravity, as some geological sites might, thenhow strong is that force? They have also now discovered particles that can move faster than light. Major change coming. I am more concerned about the electromagnetic interference in the energy layers and the cloak that sateelites are making aroung the planet. What will this do to our relationship with the rest of a particle electromagnetic universe.
    Reply With Quote  
     

  11. #10  
    Comet Dust Collector Moderator
    Join Date
    Mar 2011
    Location
    New Jersey, USA
    Posts
    2,848
    Got a reference for rats being levitated with magnetism?

    Gimme a P
    Reply With Quote  
     

  12. #11  
    Moderator Moderator Janus's Avatar
    Join Date
    Jun 2007
    Posts
    2,236
    Quote Originally Posted by Johemia View Post
    If rats can be levitated with electromagnetics and defy gravity, as some geological sites might, thenhow strong is that force?
    If you are referring to diamagnetism:
    High Field Magnet Laboratory - The Frog That Learned to Fly
    this is nothing new or revolutionary.



    They have also now discovered particles that can move faster than light. Major change coming.
    Yet to be verified. We are very early in the investigation of this claim, and it is still very possible that it is just of the result of experimental error. Don't get your hopes up yet.

    I am more concerned about the electromagnetic interference in the energy layers and the cloak that sateelites are making aroung the planet. What will this do to our relationship with the rest of a particle electromagnetic universe.
    Eh?
    "Men are apt to mistake the strength of their feelings for the strength of their argument.
    The heated mind resents the chill touch & relentless scrutiny of logic"-W.E. Gladstone


    Edit/Delete Message
    Reply With Quote  
     

  13. #12  
    Forum Junior brane wave's Avatar
    Join Date
    Jul 2011
    Location
    United Kingdom
    Posts
    244
    observation show gravity as a constant,so the whole premise is off...EM is a limited field compared to the field of gravity...
    Reply With Quote  
     

  14. #13  
    Comet Dust Collector Moderator
    Join Date
    Mar 2011
    Location
    New Jersey, USA
    Posts
    2,848
    Not true. Both electromagnetism and gravity extend outward to infinity.
    Reply With Quote  
     

  15. #14  
    New Member
    Join Date
    Oct 2011
    Posts
    2
    hello .
    I want choosing a new topic about electromagnetic field for my dissertation, please help me.
    thanks
    Reply With Quote  
     

  16. #15  
    Forum Junior brane wave's Avatar
    Join Date
    Jul 2011
    Location
    United Kingdom
    Posts
    244
    welcome mohammad,just pose your question in the physics sub forum as a new thread...
    Reply With Quote  
     

  17. #16  
    New Member
    Join Date
    Oct 2011
    Posts
    2
    no ! I am a M.sc. communication engineering. (antenna & microwave field)
    Reply With Quote  
     

  18. #17  
    Forum Junior brane wave's Avatar
    Join Date
    Jul 2011
    Location
    United Kingdom
    Posts
    244
    may i suggest the mechanical engineering sub forum...depending on your particular field of course,there are 2 choices there
    Reply With Quote  
     

Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •