A spacecraft orbits just above Earth’s surface with speed

PHYSICS · Single correct · CBSE · Physics · Gravitation · Gravitation

Problem

7.9\,\text{km s}^{-1}

. What minimum speed must it be given, at the same altitude, to escape Earth’s gravitational field? (a)

15.8\,\text{km s}^{-1}

(b)

7.9\,\text{km s}^{-1}

(c)

11.2\,\text{km s}^{-1}

(d)

9.98\,\text{km s}^{-1}