Mars has mass and radius

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

Problem

Mars has mass

6.4\times10^{23}\,\text{kg}

and radius

3.4\times10^{6}\,\text{m}

. Determine the speed (in km s

^{-1}

) of a satellite in a circular orbit

400\,\text{km}

above the Martian surface. Use

G=6.67\times10^{-11}\,\text{N m}^{2}\,\text{kg}^{-2}

. (a)

4.7

(b)

3.4

(c)

7.5

(d)

3.5