If a moving body is moving very fast would it increase in mass according to relativity?
440296
all matter, which moves in time, decreases over time
18392
According to the lorentz transformation the space time coordinate of two inertial reference frame moving at a relative speed v along x axis is\nx'=(x-v*t)/L\ny'=y \nz'=z\nt'=(t-v*x/c^2)\nwhere L is lorentz factor=sqrt(1/(1-v^2/c^2));\n\nThe tricky thhing is this if any object moves faster than light the L of above equation will become imaginary.\nSo for an observer the proper time t' and the relativistic mass m=Lm0 becomes imaginary...\n Thus it cannot be faster than light.\nHowever theoritically there exist tachyon particles which moves in superluminal(faster than light)  velocity with imaginary proper time.\n But those crazy physix!!!
837120
Mass accelerates more quickly in an intense gravitational field as compared to one that is weak.  The difference is in the time of acceleration.   On the surface of our planet, at sea level, a person accelerates at approx. 22 mph., but at the 0.717 mile location from the center of our planet a person would be accelerating at a speed 25 mph less than that of the speed of light.  Even though the mass does not physically move, the same physical properties exist as one moving in outer space at that speed.\n\nThe force of gravity is an energy factor, as found in the concept of c2 = E/m.  It is a product of a mass energy (heat) relationship.  This, of course, is obvious in that gravity performs work.
124905
There is no absolute reference frame, that is, there is no universal "stationary point" that we can use to say whether an object is moving.  Thus, every object is "at rest" in the frame of reference centered on itself.  In that frame of reference, an object's mass is always the same, its so-called rest mass.  That is the mass that you are likely thinking of when you say it doesn't increase.\n\nHowever, if the object is moving at a high speed relative to an observer, its mass is increased in the reference frame of that observer.  It will require more force to accelerate it a given amount, etc.
214684
No massive object can move at the speed of light, so the question is ill-posed. Sorry.\n\nAs a physicist, please let me give you a little advice: don't loose your time with this nonsense, try instead to focus on the mathematics of the relativity theory, that's the way to understand it. The rest is pseudo-science.
468549
This is an impossibilty.  The more you accelerate, the more mass you attain.  The more mass you attain, the more energy needed to accelerate you until the required energy becomes infinite (before you reach light speed).  However, if you are a massless person, travel at light speed would be possible but the laws of physics remain stable as massless particles have little power of interaction with the universe around them.  If you were massless, and could withstand the cold, the laws of relativity state that time would pass normally for you but you would observe the universe evolving around you at an incredible rate of speed.  At absolute zero, most of the molecules in your body will have undergone a phase transition, eg all gases (oxygen, carbon dioxide etc) will have turned into a liquid and all water would have crystallized long ago.  I would suggest wearing a set of thermal long johns before attempting this venture!
148002
It's technically impossible for something with mass (like a spacecraft) to go the speed of light in our universe under the laws of physics.  As something approaches the speed of light, it gains mass.  In theory, if something were to actually go the speed of light, it would have infinite mass, which is impossible.  \n\nOf course, no one can say for sure.  Science fiction on television and in books have gotten around these rules by using wormholes, subspace, etc., none of which are known to actually exist.
478673
Looks like a controversy here....but no, gravity does not travel faster than light, it would take eight minutes before the earth's orbit changed.\n\n(If gravity was instantaneous, then it would be possible to use that to send messages faster than light!)
1127724
As you approach the speed of light your relativic mass approaches infinity (according to einstein's theory e=mc^2) and your acceleration approaches 0.  since your mass would be infinite it would require an infinite amount of energy.  We have no way of obtaining an infinite amount of energy and since  nothing but light can go the speed of light, nothing can go faster.  (you have to go the speed of light first in order to go faster than it)
799784
In theory, yes.  Because the light particles that were traveling slower than you would have been slower.  Very good question.  However, speeding past the speed of light would mean the fundamentals of E = Mc^2, would cease to make sense.
247359
Mass interacting with gravity
66011
Special Relativity says that if you have something with a mass and then move that mass at a speed close to the speed of light it will look (to the outside) as if the mass was increased. This seems to be what you are referring to.\n\nPhotons are special in the sense that they have no mass. In this case special relativity (and much experimental verification) says that they must always travel at exactly the speed of light as seen from any reference frame.\n\nWhat can change those is the frequency (and wavelength which is inversely proportional to frequency).\n\nSo if you are floating outside a black hole and shoot a bunch of photons into the BH, you will detect the photons increase their wavelength as they fall (equivelent to lower frequencies), while their speed, the speed of light, will stay the same.\n\nThe Relativistic Mass links includes a calculator, type in a speed (like 0.8 for 80% the speed of light) and see how much your rest mass will change. Fun for the whole family!
272724
Time for the speed demon will slow down. If you reach the speed of light (theoretically impossible) time will stop, but only for you. In other words, by the time you get back to Earth, Earth will be billions of years in the future, if not much more.\n\nHowever, traveling at the speed of light is impossible. As you increase your speed, your mass increases. This was proven by Einstein by his E = mc^2 equation. Therefore, when you hit the speed of light, your mass is infinite. All the energy in the universe could not move something that had an infinite mass, obviously.
403681
"23. MASS AND ENERGY \n  \n   The best known and the most used part of the theory of relativity, which in essence does not belong to this theory, refers to the field of physics which deals with the questions of mass and energy of bodies, as well as the questions of mutual relation of mass and energy. Many physicists strongly believe that the correctness of the theory of relativity is proved in the best and most convincing way just in this sphere. \n   The theory of relativity and its author became as popular as they are thanks to the realization of some possibilities predicted by this "theory". These unusual predictions referred to the possibility of obtaining huge amounts of energy through transforming mass into energy, which was later realized in nuclear explosions and nuclear reactors. With the explosion of the first nuclear bomb the popularity of Albert Einstein and his theory increased enormously. Many, those poorly informed, unjustifiably believe Einstein to be a creator of atom bomb. \n   In classical physics mass and energy are two completely different notions, which cannot be related. According to the theory of  relativity mass and energy are one and the same, but in different forms of existence. Mass can be changed into energy, and likewise energy into mass. If a body gains energy, then its mass is increased, and if it looses energy its mass decreases. Hence, mass is greater when a body is moving than when the body is at rest, it is greater when a body is heated than when it is cold, etc. \n  \n23.1 The classical way of determining the masses of an electron in motion \n  \n   The study of electrons in motion established, first in theory, and later by experiment, that its mass changes depending on its speed. Long before the theory of relativity, in his theory on electromagnetism, published in 1892, Lorentz laid the greatest significance on the question of the interdependence of an electron's mass and its speed. While moving, the electron as an electrically charged particle creates an electromagnetic field which surrounds its. The faster the electron moves, the greater the resistance of that electromagnetic field to further increase of electron's speed. The effect is the same as if with the increase of speed the electron's mass increases. That is why that mass was named "electromagnetic mass". \n   In 1901 Kaufmann [W. Kaufmann, Gesell. Wiss. Gött. Nachr. 143, 291, 1901.; W. Kaufmann, Physik Zeitschr. 4, 55, 1902.] experimentally confirmed that an electron's mass increases with the increase of its speed. Using an electrical field to accelerate the motion of an electron and an electric field as also a magnetic field to divert the electron from its direction of motion, Kaufmann found that the mass of the electron increases in relation to its speed and that the electron has two masses, the so called transversal mass and the longitudinal mass. These findings caused a great surprise among physicists since, to that point, only one mass was known. The longitudinal mass of the electron resists increases in velocity in the direction of its motion as mass does in classical physics. The transversal mass of the electron, however, resists the deviation of the electron from its direction of motion. \n   In classical physics there is only one mass. For example, in rotary motion a body will tend to move at a tangent to the circle, because that is, at every moment, its direction of movement. However, centripetal force compels it to move in a circle. Centrifugal force and also centripetal force are the result of the resistance of the transversal mass to move in a circle. At first sight it seems that every body has two masses, longitudinal and transversal. In the case of an ordinary body, however, these two masses are of the same magnitude, so that the body will react equally to increases in the velocity of motion and the velocity of deviation. As a result only one concept of mass existed until K
1083208
first of all it is impossible for ANY ANY ANY object with mass to achive the speed of light. But theoretically if it happens then you would no more able to stay on the earth . Your centripital force is so great and large that it would flung you in the outer space.
270366
In a sense, time may be relative to size.  If you look at a time dilation equation, t' = t*(1/(1-(v^2)/(c^2))^(1/2)) you can see that time is related to velocity.  The larger (i.e. more massive) an object it, the more space it displaces and the greater the gavitational (velocity) effect.\n\n---EDIT---\n\nThe more massive an object the greater it's gravitational force.  From experimental fact, the speed of gravity is much faster than light. (Yes, I know, this contradicts Special Relativity, but that's another discussion.)\n\nAdditionally, the mass-square of the electron neutrino, measured from tritium beta decay experiments, has been found to be negative. (Yes, this too contradicts Special Relativity.)\n\nSo, from one extreme to the other, time is only relevent for a object that is moving, not for a stationary object.\n\nThat being said, there is nothing that tells us how time flows for a "moving" observer, only for a "fixed" observer.  Therefore, time must actually a constant.
25993
No.  No terrestrial object can travel at the speed of light.  If you were traveling at the speed of light you would literally dissentigrate from the millions of pounds of air resistance pinning you down.