In the case of a gravitationally bound two-body system on an elliptical orbit in which there is energy dissipation as in the case of the question 4, explain why the system first tends to have a circular orbit and later to reduce the value of the radius. Hint: look carefully at Fig. 11.6.

 Fig. 11.6.

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0 Effective potential Potential energy -Ekyp centrifugal "potential" Eell Ecirc