What object that doesn't spin produces gravity?

Question

i was told that an objects mass and density are why it has gravity and that the spin(of earth, sun,...,) has absolutly nothing to do with gravity. so there must be examples of this. thanks!

Answer 1

YOU are an example of this. All matter has gravity, and you are made of matter. Your individual gravitational field is infinitesimal, but it exists nonetheless.

Answer 2

everything has gravity. there is a gravitational attraction between you and your computer screen. But between most things the force is so low you don't feel it.The equation for gravity is force = gravitational constant*((Mass1xMass2)/radius of separation squared.) spin has no part in it.

Answer 3

the moon

Answer 4

All objects in space rotate (the Earth, the moon, the sun, asteroids, the galaxy, etc).  The rotation of an object has nothing to do with the gravity of that object.

Now, if you want to nitpick:  at the equator of a spinning object such as the Earth the gravitational force is cancelled out a tiny tiny bit by the centrifugal force of rotation.  And since you are farther from the centre of the Earth when you are the equator, the gravitational force is a tiny tiny bit less there to begin with.

But rotation is not related to gravity.

Gravity is purely a consequence of mass.

An object that doesn't spin - well, a car in your driveway isn't spinning, and it has mass so it has a gravitational field (very small, since the mass is small, but it has one all the same).

Answer 5

everything is moving wrt something else. As far as we know spin is not related to gravity. Gravity is not fully understood.

Answer 6

I was taught the same things.  So I would think that something like a comet has gravity.

Actually, WE have gravity, too, but it's just about neglible next to the earth's.

Answer 7

Examples?  Why would you need an example of a basic fact of physics?  Where did you get the idea that spin causes gravity???

Answer 8

This is a good question. To get a complete answer, you should read up on General Relativity. The basic bones of General Relativity says that gravity is caused by the curvature of spacetime. This curvature is related to the mass and energy present. ALL things in the universe produce gravity. Spinning has nothing to do with gravity aside from the frame dragging it causes.

Answer 9

"Black Holes" don't rely on spin of any solar system,  Black Holes have immense mass and even more immense density, and accordingly, phenomenal gravitation, enough to pull in entire stars, galaxys too perhaps

Answer 10

"the moon"

the moon has a rotation... otherwise we wouldn't always see the same side of the moon....

Answer 11

Venus comes pretty close to not spinning at all. It takes 243 days to rotate once time around. That is 243 times slower than Earth. But it has almost the same mass and almost the same gravity as Earth.

But in space where everything is free flying, not attached to anything to hold it still, it is nearly impossible to just stay completely still.

Answer 12

all matter and energy

Answer 13

Anything with mass has gravity.  The higher the mass, the higher the gravity.  Spin is irrelevent.  

Newton's Theory of Universal Gravitation states that two objects will attract each other with a force proportional to their masses and inversely proportional to the square of distance between them. The Universal Gravity Equation is

F = GMm/R²

    *  F is the force of attraction between two objects

    * G is the universal gravitational constant; G = 6.67*10-11 N-m²/kg². The units of G can be stated as Newton meter-squared per kilogram-squared or Newton square meter per square kilogram.

    * M and m are the masses of the two objects

    * R is the distance between the objects, as measured from their centers

    * GMm/R² is G times M times m divided by R-squared

Answer 14

alot of black holes do free rotate, but everything has its own gravitational pull, from a pebble to a boulder, but its all to small to do anything compared to the boulder we all live on

Answer 15

I don't think the sun spins...

Anything that exists has gravity, the table, your computer, a nail clipper even though the gravity of these objects are small.

Answer 16

I would think the spinning of an object would increase the gravitational pull.  Although, the slow speed of the rotation of earth or most planets wouldn't be felt or next to impossible to measure.

But as objects speed up they increase in mass which increases the gravity.  An object doesn't have to travel in a straight line for that to occur as spining can have the same effect.