Problem $5$: Disks $\backslash ($ A $\backslash )$ and $\backslash ($ B $\backslash )$ have a mass of $10$ kg and $15$ kg $,$ respectively. If they are sliding on a smooth $($no The coefficient of restitution be vith the velocities shown, determine the final speed of both disks just after impact. The coefficient of restitution between them is $\backslash ($ e$=0\mathrm{.}65\backslash ).$ For more information, please refer to Figure $5.$