Physics - Center of Mass Question with Solution | TestHub

Fission, the process that supplies energy in nuclear power plants, occurs when a heavy nucleus is split into two medium-sized nuclei. One such reaction occurs when a neutron colliding with a ${}^{235}U$ (Uranium) nucleus splits that nucleus into a ${}^{141}Ba$ (Barium) nucleus and a ${}^{92}Kr$ (Krypton) nucleus. In this reaction, two neutrons also are split off from the original ${}^{235}U$. Before the collision, we have the arrangement in figure. After the collision, we have the ${}^{141}Ba$ nucleus moving in the +z direction and ${}^{92}Kr$ is moving in -z direction. The three neutrons are moving in the xy-plane as shown in Fig. The incoming neutron has an initial velocity of magnitude $3.0\times 10^3$ m/s and a final velocity of magnitude $\frac{\sqrt{3}}{2}\times 10^3$ m/s in the directions shown.