At what altitude above the Earth’s surface will the acceleration due to gravity fall…

PHYSICS · Single correct · A Level · Physics · Fields and their consequences · Fields and their consequences

Problem

At what altitude above the Earth’s surface will the acceleration due to gravity fall to one-quarter of its surface value? Take Earth’s radius

R = 6400\,\text{km}

. (a)

4800\,\text{km}

(b)

6400\,\text{km}

(c)

12800\,\text{km}

(d)

3200\,\text{km}