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!

Weightlessness Problem

  1. Apr 25, 2004 #1
    Hi everyone I am a student in a mechanics course.

    We just had a brief intro into gravitation and newtons synthesis and I was wondering how I can solve this question...

    How long would a day be if the Earth were rotating so fast that objects at the Equator were weightless?

    The reading on the section is short, thanks for your help.
  2. jcsd
  3. Apr 25, 2004 #2

    Doc Al

    User Avatar

    Staff: Mentor

  4. Apr 29, 2004 #3
    The same question in different words:

    How fast would a satellite have to travel to stay in orbit just a few centimeters above the earth's surface?

    It's all a matter of acceleration due to gravity matching centripetal acceleration--or, in my non-inertial frame, force of gravity matching centrifugal force.

Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Weightlessness Problem
  1. Kepler Problem (Replies: 5)