In an isolated system two cars each with a mass of 1000 kg collide car 1 is intitially at rest while car 2 was moving at 10 ms they move off together what is their speed?

By conservation of momentum in an isolated system, the total momentum before the collision is equal to the total momentum after the collision. You can calculate this using the formula for conservation of momentum, which states that the initial momentum of car 2 is equal to the combined momentum of both cars after the collision. With this information, you can determine the common final speed of the two cars after the collision.