Physics

Problem

For Earth of radius

6400\,\text{km}

, find the approximate depth

d

(in km) below the surface where the acceleration due to gravity equals its value at an altitude of

10\,\text{km}

above the surface. a)

10\,\text{km}

40\,\text{km}

20\,\text{km}

5\,\text{km}