Relativistic Mass Increase

Relativistic Mass Increase

Posted in the Physics Forum

nakayama

Yokohama, Japan

#1 Aug 25, 2012
Does increasing mass (caused by acceleration) return (to rest mass) instantly when acceleration stops ? And, how about intermittent accelerated motion ?

P.S. There are two bodies (mass is the same). The one is moving to the east and the other is moving to the west in a uniform motion. Now, the two bodies begin an accelerated motion (at the same g) to the east. Is the mass increase (of the two bodies) the same ?
nakayama

Yokohama, Japan

#2 Aug 27, 2012
A book says that mass is not invariant. But itÂ’s unthinkable that phenomenon caused by collision of two masses depends on observer.

(Apology) allow me to withdraw the first half of previous post.

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