A 10,000[kg] railroad car A traveling at a speed of 10.0 [m/s] strikes an identical car B at rest. If the cars lock together as a result of the collision, what is their common speed just afterward? Please give your answer in units of m/s, however, do not explicitly include units when typing your answer into the answer box. Including actual units will result in your answer being incorrectly scored. VA = 24.0 m/s UB=0 (at rest) a) Before collision B (b) After collision