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:
https://dl.dropboxusercontent.com/u/44365627/lookangEJSworkspace/export/ejss_model_gravity02_1/gravity02_1_Simulation.xhtml
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