The mass of a certain neutron star is 1.2 * 1031 kg (6 solar masses) and its radius is 5000 m. what is the acceleration of gravity at the surface of this condensed, burned-out star

By definition we have that gravity is defined as:

g = G * M / r ^ 2

Where,

M = Mass

r = radius

G = 6.67 * 10 ^ - 11 Nm ^ 2 / kg ^ 2

Substituting the values we have:

g = (6.67 * 10 ^ - 11) * (1.2 * 10 ^ 31) / (5000) ^ 2

g = 3.2016E + 13 m / s ^ 2

Answer:

the acceleration of gravity at the surface of this condensed, burned-out star is

g = 3.2016E + 13 m / s ^ 2