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AP® Physics 1 & 2

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Gravitational Field Strength on an Exo-Planet

APPH12-CBJT1R

An exo-planet (which is a planet outside of our solar system) designated HATS 18b has been discovered to have a mass that is $629$ times the mass of the Earth, and a radius that is $15.0$ times the Earth's radius (Exoplanet Catalog. N.p., n.d. Web. 9 June 2016.)

Given ${g}_{E}$ as the strength of the gravitational field at the surface of the Earth, ​what is the gravitational field strength on the surface of HATS 18b?

A

$0.067{g}_{E}$

B

${g}_{E}$

C

$2.80{g}_{E}$

D

$41.9{g}_{E}$