where 
is the mass of the body and 
is the velocity of the centre of mass of the body. [P2.5]
of: a body
is given: by where is the mass of the body and is the velocity of the centre of mass of the body. [P2.5]
is equal: for a system of particles or bodies, to the vector sum of the individual momenta. [P2.5]
is fully specified: by giving both its magnitude and its direction. [P2.5]
is conserved: for a system of interacting objects which are not subjected to external forces. The bodies collide and exchange momentum with each other, but the total momentum is constant. [P2.5]
at high speeds must be replaced by: relativistic momentum. [P2.5]
Copyright 1997, The Open University