1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Act against Gravitational Force

  1. Feb 27, 2008 #1
    Hi all,
    I am new to Physics. Rather my profession is different.
    We are working on a project at domestic level; where i have to handle physics theory.

    Question: How can i pull object up at some distance from earth contantly against earth's gravity?

    Thanks in advance.
  2. jcsd
  3. Feb 27, 2008 #2
    A ramp...?
  4. Feb 27, 2008 #3
    Not a ramp. A Simple application like an object constantly stable without any support at some distance from ground. (Oppose to gravity).
  5. Feb 28, 2008 #4
    you need a force that is equal to (or greater if u want it to go up) 9.8 x 'mass of object', which is opposing the force of gravity... up.

    assuming there is no other forces.
  6. Feb 28, 2008 #5


    User Avatar
    Homework Helper

    A helicopter or rocket, or hovering jet (like a harrier)?
    Last edited: Feb 28, 2008
  7. Feb 28, 2008 #6


    User Avatar

    Staff: Mentor

    A mag-lev train.
    A balloon.
  8. Feb 28, 2008 #7
    Need more inputs......

    Great guess experts!

    @jackanese: thanks!

    @Jeff Reid: Yes the application behaves amost like helicopter. But helicopter is a mass development.

    It is a small kit(unit) , say a "teflon/plastic-disc" which flies at certain level at of constant speed. There has to be a motor to take that disc up from ground level and goes down when unit stopped.

    see below diagram:

    <----> : Flying disc (multi-directional movement UP/DOWN and FRWD/BKWD)

    ----------------------------- <= Ground

    How can i achieve this?

    Thanks in advance.
  9. Feb 28, 2008 #8


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    A toy-helicopter ? For about 70 Euro, you can buy one. It does exactly that...
  10. Feb 28, 2008 #9
    Maybe a superconductor?
  11. Feb 28, 2008 #10
    @vanesch: :-) Initially it will look like toy-helicopter. In progress it has to lift bulk weight.
    Anyways, your theory is useful.
    Can anybody explain how toy helicopter functions?
    Waiting for answer...
  12. Feb 29, 2008 #11


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Like a real one, but smaller...
  13. Mar 1, 2008 #12
    ...a Frisbee?
  14. Mar 3, 2008 #13
    sorry guys for late reply ... was held in some work.

    Yes it will function like "Frisbee" but machine operated and not manually.

    Simply Automated frisbee.

    Any idea how to proceed?

  15. Mar 3, 2008 #14
    Glue a toy helicopter to a frisbee?
  16. Mar 3, 2008 #15
    I want frisbee itself to be automated.
    Simply small toy helicopter!

    I would require your help in the form of useful websites, datasheets, whitepapers, e-books or forum help etc to build a toy helicopter.
  17. Mar 3, 2008 #16
    Fill a huge balloon with helium. Fix tanks to it. Tune the amount of helium so that when the tanks are empty, the balloon rises. Open valves to fill the tanks with oxygen to descend.

    Add battery driven propellers if you need to control horizontal movement.

    Stay away from strong winds.

  18. Mar 3, 2008 #17
    Hilarious thread. So may the most ingenious among you emerge and rise...

    What about a bird? I keenly advocate natural energy sources.
  19. Mar 3, 2008 #18
    @ManDay : Yes pointed perfectly.
    How can we implement Bird chars in toy like machine? Any material?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook