The average distance between the Earth's and the Moon's center is 3.856 x 108 m. The mass of the Earth is 5.972 x 1024 kg and the mass of the Moon is 7.348
x 1022 kg. What is the magnitude of the gravitational attraction between the
Earth and the Moon?
A. 9.169 x 1026
B. 1.969 x 1020
C. 6.961 x 1024

acceleration = (change in speed) / (time for the change)

change in speed = (20-120)= -100 m/s.

1.5 min = 90 sec

acceleration = -100/90 = -1.11 m/s^2.

we don't care about the 150kg or the 2,500 meters. they don't make any difference.

read more on -

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms