# physics

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A neutron star and a black hole are 5.650e+12 m from each other at a certain point in their orbit. The neutron star has a mass of 2.78×1030 kg and the black hole has a mass of 9.94×1030 kg. What is the magnitude of the gravitational attraction between the two?

• physics -

F = G M1 M2 / d^2

F = 6.67*10^-11 (2.78*10^30)(9.94*10^30)/(5.65*10^12)^2

F = 6.67*2.78*9.94/(31.9)*10^(60-11-24)

= 5.78 * 10^25 Newtons

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