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Rope from a helicopter puzzle:

Discussion in 'Science and Technology' started by Subduction Zone, Oct 27, 2021.

  1. Subduction Zone

    Subduction Zone Veteran Member

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    This is not nearly as controversial as the other thread that I started involving Veritasium. This simply asks what shape would a rope have that is hanging from a moving helicopter.
     
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  2. Altfish

    Altfish Veteran Member

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    Excellent, I guessed wrong, didn't expect that answer.
     
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  3. The Hammer

    The Hammer Wyrd Walker
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    Same. I guessed wrong too. But it makes sense.
     
  4. blü 2

    blü 2 Well-Known Member
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    Yup, I said c.

    (Or, nope, I said c.)

    Bad day when you don't learn something! Thanks.
     
  5. robocop (actually)

    robocop (actually) Well-Known Member
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    Straight down if the helicopter is not accelerating?
     
  6. Subduction Zone

    Subduction Zone Veteran Member

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    Me too.
     
  7. Subduction Zone

    Subduction Zone Veteran Member

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    No, wind resistance is a factor. The video is not that long.
     
  8. robocop (actually)

    robocop (actually) Well-Known Member
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  9. Subduction Zone

    Subduction Zone Veteran Member

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    And this is the previous video of his that I linked on DDWFTTW:

     
  10. robocop (actually)

    robocop (actually) Well-Known Member
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    I will look and see if I am right.
     
  11. robocop (actually)

    robocop (actually) Well-Known Member
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    Thanks I needed a physics refresher.
     
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  12. Subduction Zone

    Subduction Zone Veteran Member

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    You weren't the only one. It appears that most of us got it wrong. And that includes me.
     
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  13. Heyo

    Heyo Well-Known Member

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    I just watched that video before I saw your post. I wasn't sure if it would be "b" or "c" but I guessed "c". Turned out the force the rotor exerts on the rope is negligible. Astonishing when you think about how much force there seems to be towards the ground when a helicopter is starting or landing.
     
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  14. Mock Turtle

    Mock Turtle Silent Generation - so don't expect much
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    Well I did get it right, even though I suspected it also might be C - so perhaps my engineering background helped - or I've seen too many helicopters in action. :D
     
    #14 Mock Turtle, Oct 28, 2021
    Last edited: Oct 28, 2021
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  15. Heyo

    Heyo Well-Known Member

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    And here is a real life application of the "rope on a helicopter":

     
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