Calculate the escape speed from Earth’s surface

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

Problem

Calculate the escape speed from Earth’s surface. Take

g=9.8\,\text{m s}^{-2}

and Earth’s mean radius

R=6.4\times10^{6}\,\text{m}

. (a)

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

(b)

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

(c)

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

(d)

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