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Another Physics Question

Discussion in 'General Gun Discussions' started by rcnixon, Sep 20, 2008.

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  1. rcnixon

    rcnixon Member

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    You are in a van, moving forward down the road. The van is sealed and no air is flowing through. In the back compartment of the van is a balloon filled with helium, tethered to the floor of the van by a single string. You hit the brakes firmly, suddenly slowing the van. Which way does the balloon move and why?
     
  2. Loosedhorse

    Loosedhorse member

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    Where's the GOSHDARN firearm????

    No firearm, then I'm not playing. :mad:
     
  3. kingjoey

    kingjoey member

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    The balloon (or any mass) should move forward relative to the vehicle. It would also move downward because the tether forces it to move in an arc rather than a line.
     
  4. DaveBeal

    DaveBeal Member

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    When you hit the brakes, the air in the car moves forward due to its own inertia. As a result, the less dense helium balloon moves backward because it is displaced by the air. I've seen it happen.
     
  5. Loomis

    Loomis member

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    Depends on how heavy the tether is. Is there slack in the tether?
     
  6. Sean Dempsey

    Sean Dempsey Member

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    I already shot the balloon so it basically stays where it is.
     
  7. Thernlund

    Thernlund Member

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    gun-firing.jpg

    IBTL.


    -T.
     
  8. Larry Ashcraft

    Larry Ashcraft Moderator Staff Member

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    Good topic for APS.
     
  9. JShirley

    JShirley Administrator Staff Member

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    Incidentally, I suggest those with nothing better to do than post the idiotic IBTL in threads find something.

    John
     
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