What is gravity?

Question

And before you get happy and try to say it's a force.....remember that forces must have mass and acceleration. Gravity as its own entity has neither. Masses can produce forces with acceleration DUE to gravity, but what is gravity?

Please refrain from calling me Pal, in your answer. Sheesh.

Answer 1

Gravity is a phenomenon through which all objects attract each other. Modern physics describes gravitation using the general theory of relativity, but the much simpler Newton's law of universal gravitation provides an excellent approximation in many cases. Gravitation is the reason for the very existence of the Earth, the Sun, and every object in the universe; without it, matter would not have coalesced into masses and life would not exist. Gravitation is also responsible for keeping the Earth and the other planets in their orbits around the Sun; the Moon in its orbit around the Earth; the formation of tides; and various other natural phenomena that we observe.

Answer 2

Pal, you got it all wrong, forces do not have mass. They act over entities that do. i.e. A car. They have acceleration all right, gravity´s is about 9,8m/s2. Gravity is a force... But as all forces it can only be perceived as opposed to mass, not it´s own, but the body´s which it acts upon, therefore f=m*a Go look for Newton pal.

Answer 3

the truth is that no one knows. It's the thorn in the side of moden physics. People have made guesses but there is no proof. Einstein said that it was the result of the curvature of space-time. He postulated that any object with a mass warps the fabric of space-time to some degree and this changes the way that other objects move around it.

You are not correct about force however. Force has magnitude and direction. A force does not have mass or acceleration. Maybe you are confusing the formula F=MA.. this formula does not define force but rather tells you how to calculate the magnitude of a force.

Answer 4

grvity is nothing but a weak force b/w the two objects, eg take a stone or a ball witha mass of x gm. throw it vertically up ward, what newton law of g ravitation states that when a body is trown verticaaly upward, the force called gravitation called Fpulls the body or attracts to yhe centre of the earth, there fore remember (g)depends on the mass & the distance b/w the objects, & (g) is inveresely propoyional to the distance 62. the body falls witha velocity called acellaration due to gravity, when the body experiences the gravitation force.

Answer 5

In Einstein's theory of general relativity, the force of gravity is due to curvature of spacetime. This curvature is caused by the presence of massive objects. Roughly speaking, the more massive the object is, the greater the curvature it causes, and hence the more intense the gravity. As massive objects move around in spacetime, the curvature will change. If the objects move around in the right way, ripples in spacetime can spread outward like ripples on the surface of a pond. These ripples are gravitational waves.

Answer 6

gravity is due to centripetal/centrifugal force, its depepnded on object's rotation speed, volume of the object & density of the object, you will not find that above reson in officially books, its my own conclusion...& .ya this wave is part of the physics it mean gravity it self has physicaly existing , gravity's equation true for earths surface only...due to gravitational constant

basic example is the mass remain same but weight will be diff between equater of earh & north & south pole.....

Answer 7

It is an attribute of mass that has the effect of warping space/time.

How mass does this is unknown but my guess is that the media by which gravity is exhibited resides in dimensions that we haven't found a way to perceive.

Either that or it's just PFM.

Answer 8

It's just a force that keeps us down on the surface not like when astronauts float on the moon!

Answer 9

Why don't you just go look it up on the internet?-Duh! Do you really trust anyone on here to give you any intelligent answers? Do you remember your response to MY question? Nuff said.

Answer 10

Gravity is special.