rest mass vs mass

m=m_o/√1-(v²/c²)

m=mass
m_o=rest mass

tapas I m also aware of this expression,

but buddy i want to know wats the physical meaning of "rest mass"

term?

how z it different frm general " mass " term ???

The invariant mass, intrinsic mass, proper mass or just mass is a characteristic of the total energy and momentum of an object or a system of objects that is the same in all frames of reference. When the system as a whole is at rest, the invariant mass is equal to the total energy of the system divided by c², which is equal to the mass of the system as measured on a scale. If the system is one particle, the invariant mass may also be called the rest mass.

The term relativistic mass is the sum total quantity of energy in a body or system (divided by c²). As seen from the center of momentum frame, the relativistic mass is also the invariant mass.