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Homework Help: Force and Orbit Speed

  1. Dec 16, 2009 #1
    http://www.science27.com/forum/coworbit.jpg [Broken]

    How much relative stronger force would it require to keep a bull in orbit when the radius was 4 times shorter.

    And how can this are calculated...?

    (The bull only wants to move straight ahead , weight and speed is the same)


    4 times ?
    2 times ?
    8 times ?
    Or ?
     
    Last edited by a moderator: May 4, 2017
  2. jcsd
  3. Dec 16, 2009 #2
    You would need to use the centripetal force equation. If the radius was four times smaller, the force needed to keep the bull in orbit would be << answer deleted by berkeman >> times bigger.
     
    Last edited by a moderator: May 4, 2017
  4. Dec 16, 2009 #3

    berkeman

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    Staff: Mentor

    Use the equations for centripital force. You can read about them here:

    http://en.wikipedia.org/wiki/Centripital_force

    So based on that wiki page, what do you think the answer is?
     
    Last edited by a moderator: May 4, 2017
  5. Dec 16, 2009 #4

    berkeman

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    Staff: Mentor

    (This is a schoolwork-like question. Please do not give the answer. Thanks.)
     
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