Abstract
Finds a closed spatially homogeneous solution of the nonlinear Kac's model (1956), in 1+1 dimensions (velocity v and time t). Choosing for the even velocity part of the distribution function the Bobylev-Krook-Wu mode, (1975-6), the author adds an odd velocity part. The author finds the possibility of the existence of the Tjon relaxation effect, when the time t is increasing. This depends on both the initial condition and the cross section.