If you put it closer to Earth, theirs more gravitational pull, meaning it must be moving faster to orbit.........if you lose speed your orbit will frop but your'll head to the ground since it's no-long 50-50 it'll be ex. 47 for satelite since slowed and 53 for gravity since closer TOO...Your'll need MORE speed than before's orbit once "placed" at the orbit height...
Like I said, Orbital mechanics is not always intuitive. If I am in a circular orbit and wish to move to a lower circular orbit, I doing the following:
First I fire my engines in the direction I am orbiting to slow down
. This puts my speed to being less than needed to maintain a circular orbit at my altitude, so I drop into an elliptical orbit with a perigee closer to the Earth than my present altitude.
The amount I slow down will determine what my this perigee will be, so I make sure to do so by the amount that puts the perigee at the new altitude I wish to orbit.(the only way to fall all the way to the Earth is if I slowed down enough to reduce the perigee so that it dips far enough into Earth's atmosphere.)
As I fall in toward the Earth, I gain speed. By the time I reach perigee, I will be moving too fast to maintain maintain a circular orbit. If I do nothing I will complete the other half of the ellipse and will eventually return to where I started.
Instead, I fire my engines again in the same direction to slow down
again. this reduces my speed to that for a circular orbit at my new altitude. My new orbital velocity will be more than it was in my old orbit.
In effect, I apply the brakes twice and end up moving faster.
I could, if I wanted, back off my engines so that instead of slowing down all at once, I did it slowly over a long time. Done right, I could be constantly "applying the brakes" as I moved in towards the Earth and actually be gaining speed the whole time.( The opposite is happening to our Moon, It is being accelerated forward
by tidal interaction with the Earth, climbing higher and losing
speed as it does so.)
The trick is that you are trading kinetic energy(and velocity) for a change in Gravitational potential energy.