What is the gravitational force felt on Earth from the super massive black hole in the center of the Milkyway?

Question

There is a supermasive black hole in the center of the Milkyway galixy. A black hole has a massive gavatational force; the one in the center of this galixy holds the galixy together as it spins. If the gravaty of this black hole keeps the galixy together, therefor, the Earth must feel the gravatational force of that black hole. I wish to know what is that force felt on Earth.

Answer 1

OK THATS A TOUGHY

I DONT KNOW THE ANSWER BUT I DONT LIKE BLACK HOLES THERE VERY SCARY

BUT MY BUTT IS VERY RED AND  SPOTTY

Answer 2

yeh, brant pretty much has it right. the black hole in the center of the milky way is very massive and it's gravitational reach is indeed far but, we are sooo far away like 30+ thousand light years away from it that other objects like mars or the moon have a much stronger influence than it does way out here.

Answer 3

the earth doesent feel the gravitational force because it is so far away but it does move around in the milky way because of the gravity

Answer 4

It depends on the theory of gravity you are using.

In GR space-time is curved by that gravity and that results in the perception of gravity.

In the standard model gravity is a force that transmits particle but quantum Field gravity is not experimentally confirmed.

In case of GR that gravitation force will probably be expressed as the amount of time it takes our solar system to orbit the galatic center.

Black holes do not account for all the gravitation force needed to hold most galaxies intact, hence the idea of dark matter.

Answer 5

The earth is attracted to our sun as though the mass of the sun is concentrated at a single point (the center of gravity) and earth must orbit at a certain speed to balance the force of gravity.  If the sun were to collapse and become a black hole, nothing would change except that all the sun's mass would in fact reside at its center of gravity.  The earth is attracted to the center of gravity of the Milkyway regardless of whether the center contains a black hole or not.  The earth is attracted by the sum total of all the masses (of stars and black holes, etc.) drawing it toward the center and must orbit the center as part of a spiral arm.  In fact the gravitational effect upon the earth would also depend upon how much mass is closer or farther than the earth (within its spiral arm).  The gravitional attraction at the center of gravity of the earth is zero because there is an equal amount of mass in every direction (although the pressure would be very great because of the weight of all the matter above).  At the center of our galaxy, gravitational attraction would also be zero in like manner, except for the black hole you mention.  The crust of the earth prevents us from nearing its center of gravity but a black hole has no crust and you can reach the singularity at its center.  The inverse square laws of gravity predict that gravitational attraction would increase without limit (which is what crushes all matter into a singularity!).

Answer 6

lets think this up for one second this thing is 40 billion light years away so the only thing that you could feel would be us orbiting it, the black hole, Sagittarius A* is so far away its not even feel-able at the distance we are  -_-

Answer 7

I get 1.5426e+15 Newtons.  Or about 0.00000043 as much as the sun's gravitational pull on the earth.  

That's assuming a galactic SMBH of 1 billion solar masses.

Edit: Just for fun, I calculated that this is about 1/50 as much as the gravitational pull of Mars on the earth at closest approach.  So it isn't very much.

Answer 8

F = GMm/r^2

Look up the numbers and plug them in.