In order to place a satellite into orbit, it requires enough fuel to supply the necessary mechanical energy. into what types of mechanical energy does the fuel get transformed?

When a satellite is revolving into the orbit around a planet then we can say

net centripetal force on the satellite is due to gravitational attraction force of the planet, so we will have

now we can say that kinetic energy of satellite is  given as

also we know that since satellite is in gravitational field of the planet so here it must have some gravitational potential energy in it

so we will have

so we can say that energy from the fuel is converted into kinetic energy and gravitational potential energy of the satellite

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.

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