PHYSICS HELP-multiple choice
posted by Sarah .
A red ball with a velocity of +3.0 m/s collides head-on with a yellow ball of equal mass moving with a velocity of
-2.0 m/s. What is the velocity of the red ball after the collision?
B. -2.0 m/s.
C. +3.0 m/s.
D. +2.5 m/s.
E. +5.0 m/s.
I think zero but need a second opinion PLZ!! =)