Earth’s radius is

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

Problem

Earth’s radius is

6400\,\text{km}

. At point A, a mine shaft reaches a depth of

1600\,\text{km}

. At point B, a weather balloon is at an altitude of

1600\,\text{km}

. What is the ratio

\dfrac{g_{\text{depth}}}{g_{\text{altitude}}}

of the magnitudes of acceleration due to gravity at these two points? (a)

0.94

(b)

1.17

(c)

1.56

(d)

0.86