The value of acceleration due to gravity at Earth's surface is

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

Problem

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

. The altitude above its surface at which the acceleration due to gravity decreases to

4.9\,\text{m s}^{-2}

, is close to: (Radius of earth

= 6.4 \times 10^6\,\text{m}

) (1)

1.6 \times 10^6\,\text{m}

(2)

6.4 \times 10^6\,\text{m}

(3)

9.0 \times 10^6\,\text{m}

(4)

2.6 \times 10^6\,\text{m}