Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Earth disappear !

  1. Sep 3, 2008 #1
    earth disappear!!!!!!

    Suppose an object is thrown onto the sky from the surface of the earth. After it reaches certain height, earth disappears without disturbing the surrounding or the atmosphere.
    what happens to the potential energy of the object.
    as there will be no any gravitational pull, eventually, potential energy of the object will be zero. However, my question is what happens to the potential energy (Mgh). how is the total energy gonna conserve
  2. jcsd
  3. Sep 3, 2008 #2


    User Avatar
    Staff Emeritus
    Science Advisor
    Gold Member

    Re: earth disappear!!!!!!

    What happened to the earth? As soon as you vanished the earth you violated conservation laws. Why do you expect conseveration laws to be valid for your test object?
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook