A mass, $"=1,$ initially moves with

velocity, $),"=9\mathrm{.}90$ m$/$s $(),$ and bounces off another equal mass, $6,$ initially at rest.

After the collision occurs what is the velocity

of the first mass?

a$.7,6=9\mathrm{.}90$ m$/$s $(+)$

b$.7,"=19\mathrm{.}8$ m$/$s $()$

c$.7,$:$)$; $=4\mathrm{.}95$ m$/$s $()$

d$.7,"=0\mathrm{.}0$ m$/$s $()$

e$.$ Not enough information