Question

Two satellites S and S' revolve around the earth at distances 3R and 6R from the centre of the earth. Their periods of revolution will be in the ratio :

• A. 1 : 2
• B. 2 : 1
• C. 1 : 2^1.5
• D. 1 : 2^0.67

Answer 1

Answer: (C)

1 : 2^1.5

Answer 2

T² µ r³ Ž $\frac { T _ { 1 } } { T _ { 2 } } = \left( \frac { 3 R } { 6 R } \right) ^ { 3 / 2 }$ = 1 : 2^1.5