
#1
Dec2906, 05:05 AM

P: 164

I've heard that when an object is accelerated at huge huge speeds they actually gain mass. Is there a formula to see how much mass an object would gain will going a certain velocity.




#2
Dec2906, 06:08 AM

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P: 9,789

I quote RandallB, since this topic was somewhat discussed in this thread recently.
Invarient Mass Relativistic Mass Relativistic Mechanics 



#3
Dec2906, 06:59 AM

P: 154





#4
Dec2906, 07:14 AM

P: 100

Changing Mass
after reading those links, then let me see if I understand:
mass has 2 situations: invariant mass, that, independent from the observer, it has a defined value. relativistic mass, that depends on observer. relativistic mass is "transformed" by lorentz factor. invaritant mass, isn't "tranformed", and it is normally the mass that we use in classical mecanics, in expressions like: density=m/V, kinectic E=1/2mv^2, potential E=mgh and so1. relativistic mass, is used in modern mecanics, and is too "named" as energy, by the E=mcc. both masses can be used in momentum expression(p=mv) in case of photon, it has no invariant mass, but as it have energy, we must assume it as relativistic mass am I right about this?? Regards, littlepig 



#5
Dec2906, 07:29 AM

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#6
Dec2906, 08:19 AM

P: 100

i couldn't say the energy released by hidrogen in man "B" couldn't be greater than in man "A". The invariant mass doesn't varies, because velocity doesn't take efect on invariant mass....humm....getting it... thank you for your help and links... 


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