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Thread: Physics question

  1. #16
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    Quote Originally Posted by Parihaka View Post
    And there it is, thanks Dale.

    R = 9.81g/(((pi x rpm)/30)^2)
    I Don't get it.

    G is gravity. 9.81 is 1G. so why are your timesing gravity by gravity...

    pi x rpm = radians or w....

    net effect I still get r x w = v.

    which should come out as the same answer above.


    *sigh*...

    edit stuff it im going back to the winch.

  2. #17
    Dirty Kiwi Parihaka's Avatar
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    Quote Originally Posted by Chunder View Post
    I Don't get it.

    G is gravity. 9.81 is 1G. so why are your timesing gravity by gravity...

    pi x rpm = radians or w....

    net effect I still get r x w = v.

    which should come out as the same answer above.


    *sigh*...

    edit stuff it im going back to the winch.
    Sorry,
    g = Decimal fraction of Earth gravity (i.e. the level of g you want to create)
    R = Radius from center of rotation in meters
    π = 3.14159
    rpm = revolutions per minute

    roughly 1,850,000km radius.



    Bugger, that's a big number....

  3. #18
    Lord High Hullabalooster Senior Contributor dalem's Avatar
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    Yeah. I'm no engineer, Pari, but I'd suggest you spin it faster.

    -dale

  4. #19
    Dirty Kiwi Parihaka's Avatar
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    Quote Originally Posted by dalem View Post
    Yeah. I'm no engineer, Pari, but I'd suggest you spin it faster.

    -dale
    Yeah I was just hoping for the natural cycle but the size of the thing doesn't suit the scenario

  5. #20
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    Quote Originally Posted by dalem
    It's the centripetal force you're actually concerned with, Pari.

    I don't have an exact formula to get you to the "g"s, but I do have some links to some related fun stuff that can help:

    XKCD cartoon.
    One of my favorite XKCDs.
    I enjoy being wrong too much to change my mind.

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