Respuesta :
Relative to the earth, the trains' speed is 15 m/s.
Relative to the train, the ball's speed is -15 m/s.
Therefore, relative to earth, the ball's speed is
15 - 15 = 0
Answer: 0
Relative to the train, the ball's speed is -15 m/s.
Therefore, relative to earth, the ball's speed is
15 - 15 = 0
Answer: 0