The Naked Scientists

The Naked Scientists Forum

Author Topic: Why did sheets of glass behave strangely?  (Read 942 times)

Offline thedoc

  • Forum Admin
  • Administrator
  • Sr. Member
  • *****
  • Posts: 511
  • Thanked: 12 times
    • View Profile
Why did sheets of glass behave strangely?
« on: 31/03/2016 09:50:02 »
martyn asked the Naked Scientists:
   Hello, I would like you explain this. I was driving behind this gentleman with a trailer, it had sheets of glass in it but suddenly
the sheets of glass flew out the trailer about 1 every second approx.
My question is why does this go against all known laws of Physics.
But if you watch the forbidden planet could this explain the unknown?
What do you think?
« Last Edit: 31/03/2016 09:50:02 by _system »


 

Offline Bored chemist

  • Neilep Level Member
  • ******
  • Posts: 8667
  • Thanked: 42 times
    • View Profile
Re: Why did sheets of glass behave strangely?
« Reply #1 on: 31/03/2016 20:03:32 »
I think the wind catching them is more likely to explain it than a TV show.
 

Offline evan_au

  • Neilep Level Member
  • ******
  • Posts: 4123
  • Thanked: 246 times
    • View Profile
Re: Why did sheets of glass behave strangely?
« Reply #2 on: 31/03/2016 21:01:42 »
I think that failing to tie down his load securely may also have had something to do with it.
 

Offline RD

  • Neilep Level Member
  • ******
  • Posts: 8132
  • Thanked: 53 times
    • View Profile
Re: Why did sheets of glass behave strangely?
« Reply #3 on: 31/03/2016 23:02:18 »
... I was driving behind this gentleman with a trailer, it had sheets of glass in it but suddenly the sheets of glass flew out the trailer about 1 every second ...

There can be vortex shedding behind a vehicle ...

https://youtu.be/tmU-dcK9Q_0?t=6s

which could produce anti-intuitive effects :
 e.g. objects being lifted-up instead of pushed-down by air flow , at regular intervals.
« Last Edit: 31/03/2016 23:18:39 by RD »
 

Offline Ophiolite

  • Hero Member
  • *****
  • Posts: 716
  • Thanked: 6 times
    • View Profile
Re: Why did sheets of glass behave strangely?
« Reply #4 on: 03/04/2016 16:57:20 »
Anyone who is so careless in the transportation of glass is no gentleman.
 

Offline alancalverd

  • Global Moderator
  • Neilep Level Member
  • *****
  • Posts: 4717
  • Thanked: 154 times
  • life is too short to drink instant coffee
    • View Profile
Re: Why did sheets of glass behave strangely?
« Reply #5 on: 03/04/2016 17:27:24 »
Aerodynamic lift.

It works for wood and metal aeroplanes, and many small planes are made of glass fibre. Air flowing over the top of a trailer will be at a lower pressure than the air beneath or within it, so the glass will be lifted. As the old saying goes, a piano will fly if you can make it go fast enough.
 

The Naked Scientists Forum

Re: Why did sheets of glass behave strangely?
« Reply #5 on: 03/04/2016 17:27:24 »

 

SMF 2.0.10 | SMF © 2015, Simple Machines
SMFAds for Free Forums