Find the acceleration of our galaxy, due to the nearest comparably sized galaxy. The approximate mass of each galaxy is 8 × 1011 solar masses and they are separated by 2 million light-years. Each galaxy has a diameter of 100,000 light years.

(Assume 1 light year 1016 m, Gravitational constant G = 10-10 \(\rm\left( {\frac{{Nm^2}}{{kg^2}}}\right)\) and mass of sun = 2.0 × 1030 Kg)

1
4 × 10-13 m/s2
2
2 × 10-13 m/s2
3
5 × 10-15 m/s2
4
5 × 10-13 m/s2

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