A $11\mathrm{.}7$g object moving to the right at $19\mathrm{.}1$cm$/$s makes an elastic head$-$on collision with a $14\mathrm{.}3$g object moving in the opposite direction at $28\mathrm{.}0$cm$/$s$.$ What is the velocity of the $11\mathrm{.}7$g object after the collision $($assume positive to the right$)?$

$$Tries $0/10$

What is the velocity of the $14\mathrm{.}3$g object after the collision?