Introduction to Electrodynamics · Problem 12.31

Electrodynamics and Relativity — David J. Griffiths

Physics · center-of-momentum-frame

Problem

Suppose you have a collection of particles, all moving in the

x

direction, with energies

E_1, E_2, E_3, \ldots

and momenta

p_1, p_2, p_3, \ldots

. Find the velocity of the center of momentum frame, in which the total momentum is zero.