A planet has radius and surface acceleration due to gravity

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

Problem

A planet has radius

5.0\times10^{6}\,\text{m}

and surface acceleration due to gravity

9.0\,\text{m s}^{-2}

. Determine the altitude

h

at which

g'

falls to

7.2\,\text{m s}^{-2}

. (a)

1.2\times10^{6}\,\text{m}

(b)

5.9\times10^{5}\,\text{m}

(c)

8.8\times10^{5}\,\text{m}

(d)

4.8\times10^{5}\,\text{m}