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!

How does Zero-G work?

  1. Nov 19, 2011 #1
    I understand that the airplane accelerates at the acceleration due to gravity in the downward direction, making the acceleration of the person relative to the airplane zero. But the acceleration due to gravity isn't constant, so I was wondering if someone could show me how you could calculate the acceleration needed for an airplane at certain altitudes?
     
  2. jcsd
  3. Nov 19, 2011 #2
    Oh, wait. I'm so dumb....

    acceleration due to gravity = Gm/r^2

    From that formula, you could calculate the acceleration needed at different altitudes. I still don't understand how would I find the equation to model the airplane's position using sine waves. Any ideas?
     
  4. Nov 19, 2011 #3

    D H

    User Avatar
    Staff Emeritus
    Science Advisor

    Earth gravity decreases by about 0.3086 mGal per meter of increased altitude near the surface of the Earth. This is the free air correction.

    As for your question, this is very tiny, even for a couple of kilometers of altitude change.
     
  5. Nov 19, 2011 #4

    rcgldr

    User Avatar
    Homework Helper

    During the zero g portion of flight, the airplane is following a parabolic path (technically an elliptical path if you don't consider the earth to be flat), with a downwards acceleration of 1 g and near constant horizontal component of velocity.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: How does Zero-G work?
  1. How does glasses work? (Replies: 7)

  2. How does a cd work? (Replies: 1)

Loading...