Friday, February 3, 2012

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

The mass of a certain neutron star is 3.0 multiplied by 1030 kg (1.5 solar masses) and its radius is 7050 m. What is the acceleration of gravity at the surface of this condensed, burned-out star?What is the acceleration of gravity at the surface of this condensed, burned-out star?mg = G m * m1 / r^2

r = 7050 m

G = 6.67 * 10^-11

m = 1 kg (or anything else)

m1 = 3 * 10^30



First note that m is on both sides of the equation and cancels out.

Second. F = mg and F = Gm*m1/r^2 are both the same forces.



g= 6.67*10^-11 * 3 * 10^30/ 7050^2

g = 4.03 * 10^12 which is huge but the density of the star is also huge.

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