sjdpdpisdjsipjd9469 sjdpdpisdjsipjd9469 20-12-2022 German contestada A toy train car of ma 3. 0 kilogram i moving at 17. 5 m/ when it collide with another car of ma 4. 0 kilogram which i at ret. After the colliion they lock and move together. Find the common final peed. Expre your anwer in m/