A two-stage rocket is traveling at 4300 m/s before the stages separate. The 3500-kg first stage is pushed away from the second stage with an explosive charge, after which the first stage continues to travel in the same direction at a speed of 3000 m/s .Part AHow fast is the 1800-kg second stage traveling after separation?Express your answer with the appropriate units. Enter positive value if the stage moves in the direction of motion of the rocket and negative value if the stage moves in the direction opposite to the direction of motion of the rocket.v =…