Question

A small satellite is revolving near earths surface. Its orbital velocity will be nearly:

• A. 11.2 km/sec
• B. 6 km/sec
• C. 4 km/sec
• D. 8 km/sec

Answer 1

Answer: (D)

8 km/sec

Answer 2

From the formula the orbital velocity near earth is $=\sqrt{Rg}$ $=\sqrt{6.4\times {{10}^{6}}\times 10}=8km\text{/}\sec$