cenrte of mass

Asked by Venkat phy lect | 13th Dec, 2013, 08:14: PM

Expert Answer:

The centre of mass of earth-moon system is
 
 
The external force on the earth-moon system is the gravitational force of sun.
 
 
 
The earth and moon are very close to each other as compared to their distance from the sun. 
Thus, we can assume re ≈ rm ≈ Rcm
 
 
Thus, the centre of mass of earth-moon system moves elliptically like a ploanet of mass Me + Mm.

Answered by Romal Bhansali | 16th Dec, 2013, 10:58: AM

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