what is gravity?

Answer 1

If anyone knows, they're keeping it a secret. It is defined in relativity as a curvature of time-space caused by matter (as mass). Quantum physics deals with forces and tiny particles, so that gravity is largely irrelevant.

Some theories postulate gravity waves/particles (gravitons) to complete the table of forces mediated by waves/particles, but no one has explained how they appear to act instantaneously, unlike every other force.

Unless you are asking about "gravitas," or seriousness, and not the issue in physics.

Answer 2

Think about a cloth having grids of lines printed across it. and u put a ball on it. the centre of the cloth will be depressed by the weight of the ball and the grid lines will appear to be curved. The heavier the ball, steeper will be the curvature of grid lines. This curvature is nothing but gravity of that ball with respect to the cloth. Gravity of a body is a property by virtue of its "mass", the space-time continum is curved around it. The curvature of this curve is called gravity. If u put a lighter ball on the cloth, u'll find it is moving towards the heavier ball at the centre. Higher the mass of the center ball steeper 'll be the curve and the lighter ball will move faster towards it (means the body at center has higher gravity!). If u move away from the centre then the curves will be flat so gravity is not felt in space.

Answer 3

Current relativistic theory states that gravity is nothing more than the warping of the space-time continuum by a massive object, much like putting a bowling ball on a mattress. That would mean that gravity is nothing more than the acceleration of a body towards another body as it "glides" through the warp generated in space-time.

Answer 4

Gravitation 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 5

Gravity is a force of attraction only between bodies that have mass.

Answer 6

I was coming down the stairs and I fell. In pain, I was crying and saying "Why did this happen to me? How on Earth did I fell from that little step??".

The doctor said "Gravity!"

Answer 7

It is the force of attraction which exists between any two masses and is given by Newton's law of gravitation F = G(m1xm2)/r^2 where m1 and m2 are the two mases G is a universal constant and r is the separation of the masses, all in SI units

Answer 8

Gravity is a manifestation of space in the presence of matter.

Answer 9

The Earth's attraction of an object. Did Newton discover or invent it when he saw the apple fall? Not too sure there, but he was the first to put into legible words the 'why' the earth pulls objects down.

Answer 10

gravitation is one of the four (the weakest of the four) fundemental forces of the known universe. All objects that have mass create a corresponding warp in the fabric of space time and has an attraction to all other objects that have mass that is proportional to their mass and inversely proportional to the square of the distance bewtween objects having mass..