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gravity02_1

7.1.5 Example (N09/I/16) Binary Stars 

Example (N09/I/16) Binary Stars

Two stars of mass M and 2M, at a distance 3x apart, rotate in circles about their common centre of mass O.
The gravitational force acting on the stars can be written as  k G M 2 x 2 .
What is the value of k?
A  0.22             B  0.50                C  0.67             D  2.0

Model: You may view the movement of the two stars using the EJSS below link (require internet) or just below:

7.1.5.1 Model: You may view the movement of the two stars using the EJSS below link (require internet) or just below:

  1. Run Sim
  2. http://iwant2study.org/ospsg/index.php/53

Answer is | F | = G M 1 M 2 r 2 = G 2 M M ( 3 x ) 2 = 2 9 G M 2 ( x ) 2

 

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Translations

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Software Requirements

SoftwareRequirements


Android iOS Windows MacOS
with best with Chrome Chrome Chrome Chrome
support full-screen? Yes. Chrome/Opera No. Firefox/ Samsung Internet Not yet Yes Yes
cannot work on some mobile browser that don't understand JavaScript such as.....
cannot work on Internet Explorer 9 and below

 

Credits

Fu-Kwun Hwang - Dept. of Physics,National Taiwan normal Univ.; Loo Kang Wee; Wolfgang Christian

end faq

http://iwant2study.org/lookangejss/02_newtonianmechanics_7gravity/ejss_model_gravity02_1/gravity02_1_Simulation.xhtml

 App

Versions

  1. http://weelookang.blogspot.sg/2016/07/binary-stars-javascript-model-by-fu.html

Other resources

  1. https://phet.colorado.edu/sims/my-solar-system/my-solar-system_en.html

 

end faq

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