What is the gravitational force of an 89 kg human standing on a neutron star with a mass of 4.67times 10^30kg and that radius in 12,000 m? 1.9times 10^14N 1.9times 10^14m 1.9times 10^14kg 1.9times 10^14Nm2/kg2 1.93times 10^14N 1.93times 10^14m 1.93times 10^14kg 1.93times 10^14Nm2/kg2 2.31times 10^18N 2.31times 10^18m