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`        If mass of moon =0.013 mass of earth,Distance between centres of masses of moon and earth is 60 times the radius of earth,then how do I get the position of centre of mass of moon and earth in terms of radius of earth`
one year ago

Arun
23487 Points
```							 The net gravitaional force due to both would be zero then after.Hencegravity Earth + gravity moon  = 0 Gm/(x^2)+ GM/(D-x)^2 = 0Aand given M = 81mWe get,Gm/(x^2) + 81Gm/(D-x)^21/x = 9/(D-x)9x = D-x10x = Dx = D/1010x = Dx = D/10
```
one year ago
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### Course Features

• 110 Video Lectures
• Revision Notes
• Test paper with Video Solution
• Mind Map
• Study Planner
• NCERT Solutions
• Discussion Forum
• Previous Year Exam Questions