Physics

Problem

Acceleration due to gravity at an altitude of

100\,\text{km}

above Earth’s surface equals that at a certain depth

d

below the surface. With

R = 6400\,\text{km}

, the value of

d

is a)

100\,\text{km}

190\,\text{km}

200\,\text{km}

260\,\text{km}