As I see, no one answers you here, because you don’t know anything more about the crowd.Jonas van der Kleij’s answer leads once again to the typical confusion and equality of both things.
The short answer, for the layman.
Mass is an effect in a field of gravity that prevents an object from moving at the speed of light.
The longer answer, for the physically interested.
The property of the mass can capture and calculate the standard model, but cannot yet explain it, because the connection has not yet been recognized, but it is agreed that the model of imagination is obviously not suitable for the problem. to solve it.Therefore, you should not expect an answer, as you can usually fish them out of the Internet, but it is my most own interpretation of the known facts.
The first most important fact is that only matter has mass, and both are often equated.But on the one hand matter is the present object and on the other hand the mass is its future effect on movement in a gravitational field. Therefore, mass cannot be attractive because it is not a thing, but matter is the thing that is attractive.
Matter also has other effects besides mass, including the gravitational and thus also the electromagnetic, as well as the inner spin, whereby this is now again associated with movement, from which also the mass originates.There is therefore an inner movement, which must in any case represent a hindrance to the straight forward direction of the object. For a spin would certainly not be detectable if the inner directions of the movements all showed in the same direction.
And it is precisely with this direction of movement that we will have an instrument with which we can explain the disability.We also know this as inertia, i.e. to oppose the speed of light. Because if two horses pull on a cart but run in different directions, then the car will probably never be able to reach the maximum possible speed. And that is exactly what the mass should be.
But there was still this effect in a field of gravity.For mass, in other words, the rotating inner movement, does not represent the whole lot, but its special effect in a gravitational field. And that particular effect is the constant repetition of movement in a limited field of possible effects determined by the radius of its frequency. Gravity always affects movements only, whereby the distances towards the gravitational centre are always shorter and if the inner movements of the object constantly pass through the shorter distances, then this becomes the difference in the length of the distances towards gravitational Centre.
But there was also the increase in mass and speed at the end.The increase is merely the better alignment of the inner movements in a common direction and these can only be effected by other gravitational fields. The remarkable thing, however, is the enduring character of the direction of movement. Because the moving object retains this changed inner direction of the movements, because there are no resetting effects of its own. And with this, an as yet uninterpreted effect on what the whole world is looking for shows. It is another way of transmitting the alternating effects, i.e. not the effect altered by quantum, but the effect of a changed direction.
In concrete terms, this means that the search for the gravitational is illusory and the 2.type of interaction is transmitted without substance.This is just described here is actually a sensation, but it is collectively ignored, you experience it live, never a layman will come and show the stinkfinger to the entire physical faculties.