Part A. The closest major galaxy to our own Milky Way Galaxy is the Andromeda Ga

Question

Part A. The closest major galaxy to our own Milky Way Galaxy is the Andromeda Galaxy, which is about 2.5 million light years distant. Assume that each galaxy has a mass equal to 7.4 × 1011 times the mass of the Sun. What is the magnitude of the gravitational force between these two galaxies? One light year is the distance that light travels in one year (365 days). The speed of light in a vacuum is 3.00 × 108 m/s. Answer in N.

Part B.The International Space Station (ISS) has a mass of 411,000 kg, an average speed of 2.73 × 104 km/h, and an average height above the Earth's surface of 358 km.
(2a) What is the average kinetic energy of the ISS?

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(2b) What is the average gravitational potential energy of the ISS?

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Explanation / Answer

gravitational force between galaxy :

Gm1m2/r2

r = 23.5x10^18 km

=23.5x10^21 m

G = 6.67x10^-11

M(galasy) = 14.71x10^41 kg

F = 6.67x216.63x10^71/552.25x10^42

=2.61x10^29 N

B)

k.E = 0.5mv^2

m =411000 kg

v =2.73x10^4 km/hr =7583.33 m/s

K.E =1.18x10^-13 joules

Gravitiational potential energy = mgh

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