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I Best way to create artificial forces

  1. May 11, 2016 #1
    First of all hello everyone, I'm a recent graduate and now im a mechanical engineer (WEEEEE) and wanted to embark in a project that involves creating artificial forces (newton's third law kind of forces).

    The project basically must have something to counter forces exercised by a hand, i.e. if i press forward I need to create a way to have an artificial force push back. It doesn't have to be too strong but something that you can feel a force acting on it. It can include gloves or anything similar

    Cheers!
     
    Last edited: May 11, 2016
  2. jcsd
  3. May 11, 2016 #2

    A.T.

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    All forces (in inertial frames) are newton's third law kind of forces.

    For that hit your head with your hand. Might also give you a more interesting project idea.
     
  4. May 11, 2016 #3
    Love is the strongest force and is not netwon's kind of force

    And that hasnt been working lately, that's why i recurred to the forum.

    Thanks for the input tho!
     
  5. May 11, 2016 #4

    jbriggs444

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    Put on a pair of gloves. Mix up a batch of concrete. Put left hand in concrete. Hold still while concrete sets.

    Optional: Arrange for hammer in right hand.
     
  6. May 11, 2016 #5
    hahahahaha i'm loving this forum already
     
  7. May 11, 2016 #6

    CWatters

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    I know you are weren't being serious but doing something like this can be dangerous...

    http://www.telegraph.co.uk/news/ukn...ster-of-Paris-accident-during-art-lesson.html

     
  8. May 11, 2016 #7
    So you are exerting the strongest force of them all. On the forum, I suppose. :)
    Is this a natural (organic) or an artificial force?
     
  9. May 11, 2016 #8

    berkeman

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    Welcome to the PF.

    Something spring loaded could work. Or a stationary object? What other characteristics do you need, and why can't it just be a spring or stationary object? The more you can tell us, the better we can try to answer you. :smile:
     
  10. May 11, 2016 #9

    CWatters

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    How about a bucket of corn flour and water (anti-thixotropic)?
     
  11. May 11, 2016 #10
    If im honest i have an idea of a way i just wanted to see if people came up with different ideas. It cant be spring loaded because there cannot be any actual devices in contact with the hands.

    I thought about gloves with metal parts distributed along the glove, then when it would pass a defined place or line a magnet or magnet towers or something similar would pull from behind. something like a mime if you may mimepng-c99e6a6fac9ce25d.png

    so:

    rwotq9.png

    * = magnets deactivated
    * = magnets activated
    ! = limit line
    o[ = person with gloves deactivated
    o{ =person with gloves activated
     
  12. May 11, 2016 #11

    berkeman

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    Using magnets can be problematic, because it's way too easy to demagnetize people's credit cards, etc. You could make a mechanical harness that fits to the user's body that has arms that reach out to the hands and provide a counter-force, I suppose...
     
  13. May 11, 2016 #12
    hm, thats one of the things i thought about too, it would also be using a computer and im not sure how much that would affect it. That second option was also an option i thought of but i wanted it to be as little invasive as possible.

    putting the credit cards aside, if it was under a controlled environment with just a person, a computer and gloves do you think the magnets would work?
     
  14. May 11, 2016 #13

    berkeman

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    I wouldn't think so. If you just have metal parts in the gloves, they will always be attracted to the wall magnets, which is the opposite of what you want. If you try to put magnets in the gloves and point the opposite polarity toward the wall magnet, that will for for a fraction of a second until the gloves spin around and yank the user's hands toward the wall magnets.

    If you try to use an AC magnetic field and eddy currents to push the metal in the gloves away, that will create some serious heating issues in the gloves.

    You may not be able to, but can you say more about the application? There may be some other options that would be more viable. :smile:
     
  15. May 11, 2016 #14

    jbriggs444

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    How about sensors that detect motion of the hands and produce an equal movement in the room. Something like a 6 degrees of freedom flight simulator.
     
  16. May 12, 2016 #15

    CWatters

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    Hypnosis might work :-)
     
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