At what approximate altitude (in km) above Earth’s surface will the acceleration due…

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

Problem

At what approximate altitude

h

(in km) above Earth’s surface will the acceleration due to gravity reduce to one-half of its surface value? (Use

R = 6.4\times10^{6}\,\text{m}

and give the answer to the nearest

50\,\text{km}

.) (a)

3\,200\ \text{km}

(b)

2\,650\ \text{km}

(c)

1\,600\ \text{km}

(d)

6\,400\ \text{km}