A spaceship is launched into a circular ...

A spaceship is launched into a circular orbit close to the earth's surface . What additional velocity has now to be imparted to the spaceship in the orbit to overcome the gravitational pull. Radius of earth `= 6400 km`, `g = 9.8m//s^(2)`.

`3.28 km//s`

`12 km//s`

`10 km//s`

`40 km//s`

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