$2.$ The two handcars $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ each have a mass of $80$ kg $.$ Both cars are initially at rest. Both cars start from rest before the man jumps. If the man $\backslash ($ C $\backslash )$ has a mass of $70$ kg and jumps from $\backslash ($ A $\backslash )$ with a horizontal relative velocity of $\backslash ($ y$\_\{$s$-$A$\}=2\backslash$mathrm$\{$~m$\}/\backslash$mathrm$\{$s$\}\backslash )$ and lands on $\backslash ($ B$,1\backslash ))$ draw momentum of car A before and after jump, $2)$ draw momentum of car B before and after lading, $3)$ determine the velocity of each car after the jump. Neglect the effects of rolling resistance.