A spaceship is launched into a circular orbit close to earth's surface. What additional velocity ha now to be imparted to the spaceship in the orbit to overcome the gravitational pull? (Radius of earth = 6400 km and\[\text{g }=\text{ 9}\text{.8 m}/{{\text{s}}^{\text{2}}}\])

A spaceship is launched into a circular orbit close to earth's surface

1.	A spaceship is launched into a circular orbit close to earth's surface. What additional velocity ha now to be imparted to the spaceship in the orbit to overcome the gravitational pull? (Radius of earth = 6400 km and\[\text{g }=\text{ 9}\text{.8 m}/{{\text{s}}^{\text{2}}}\])
A.	2.83 km/s
B.	3.28 km/sec
C.	6.68 km/s
D.	8.32 km/sec
Answer» C. 6.68 km/s

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A spaceship is launched into a circular orbit close to earth's surface. What additional velocity ha now to be imparted to the spaceship in the orbit to overcome the gravitational pull? (Radius of earth = 6400 km and\[\text{g }=\text{ 9}\text{.8 m}/{{\text{s}}^{\text{2}}}\])

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