The Moon goes around the Earth in in an approximately circular orbit of radius

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

Problem

The Moon goes around the Earth in

27.3\,\text{days}

in an approximately circular orbit of radius

3.84\times10^{8}\,\text{m}

. Taking

G=6.67\times10^{-11}\,\text{N m}^2\!\text{/kg}^2

, the mass of the Earth is closest to (a)

1.2\times10^{25}\,\text{kg}

(b)

6.0\times10^{24}\,\text{kg}

(c)

3.0\times10^{24}\,\text{kg}

(d)

6.0\times10^{23}\,\text{kg}