Physics

Problem

Escape velocity of a body from earth is

11.2 \text{ km/s}

. If the radius of a planet be one-third the radius of earth and mass be one-sixth that of earth, the escape velocity from the plate is: (1)

11.2 \text{ km/s}

(2)

8.4 \text{ km/s}

(3)

4.2 \text{ km/s}

(4)

7.9 \text{ km/s}