Rest mass is the mass which increases with velocity.

$$ Eric Gisse wrote: Y.Porat wrote: -=-
F / gamma*a = mass
and addd iN THAT CASE m [ i.e. "at REST" ] iS CONSTANT!!

$$ REST (iNTRiNSiC) energy m*c^2 increases with motion, Dimwit.!!
-=-
Rest mass is an invariant - it doesn't change
no matter which reference frame you are observing it in.

$$ REST mass is the mass which iNCREASEs with velocity, Dimwit.!!
$$ How many possible different ways can you Mis-UNderstand THAT?.
-=-
$$ There is NO Angular momentum in GR and Linear momentum is p in GR.
$$
$$ m_1 REST
$$ A MOViNG REST mass = m_1 REST + --------------- = m_2 REST, mass.
$$ Sqrt(1-v^2/c^2)
$$
$$ KiNETiC/c^2 + REST mass m_1 = Delta REST mass m_2 absorbed @ m_3.
$$
$$ i.e. Note iNTRiNSiC REST mass of m_3 is inCREASED ..by Delta m_2.
$$ i.e. Note iNTRiNSiC REST mass of m_0 is deCREASED ..by Delta m_2.
$$
$$ A PHOTON is simply *DELTA* REST mass *TRANSFERED* from m_0 ~ m_3.
$$ [Where all KiNETiC energy ..of TRANSFERENCE *can* come from m_0].
-=-
[REST] m is always constant because it is rest mass. [ snicker ]

$$ NOTiCE m is ALWAYs constant ..only WHEN it isN'T MOViNG, Dimwits.
$$ [You are by far the very MOST DENSE form of Dimwit in GR-Tivity].
-=-
[REST] m is always constant, retard. [Except WHEN it MOVEs, Dupe.]

$$ You seem ignorant that an SI "kilogram" isN'T a Coup-GR "mass".!!
-=-
REST (iNTRiNSiC) energy m*c^2 increases with motion ..Dimwits.!!
Rest mass is the mass which increases with velocity v ..Dupes.!!
DELTA (absorbed) REST mass, m_photon = h*fL/c^2. End of POST.!!

$$ r norman wrote: trim a lot more nonsense
Rest mass is the mass at rest, that is, moving at zero velocity in
your frame of reference.. When the object gets moving at high
velocity, its mass changes but the object is no longer at rest so
the new value can't really be called "rest" mass.

$$ We distinguished REST m_original + (Kinetic eK)/c^2 ..as REST m_2.
$$ This "new value" CAN REALLY be called iNCREASED "rest" mass, Dupe.
$$ The new value CAN REALLY be called *iNCREASED* REST mass m_2, Dud.
$$ The REST m_2 is the DiFFERENCE of rest mass the EMiTTER DEcreases.
$$ The REST m_2 is the DiFFERENCE of rest mass an ABSORBER iNcreases.
$$ The REST m_2 is the DiFFERENCE of, h*fL/c^2, a DETECTOR iNcreases.

Rest mass is the mass which increases with velocity. End REPLY.