Respuesta :
you would need a direction to determine the velocity because velocity is speed with a direction. 40km/h is just speed.
Velocity is the direction and the rate of the movement by the object with respect to the time frame. To determine the velocity of the train direction is required.
What are speed and velocity?
Speed is the scalar quantity that determines the time rate of the object that moves in a path, it can be said as the rate of the motion or how fast or slow the object is moving.
The velocity of the object is determined by the rate of the object and its direction and is the vector quantity. It tells about the rate at which the change in the position of the object occurs.
In order to determine the velocity of the object, the speed of the object and its direction is required as velocity is the speed with direction.
Therefore, the direction of the train is also required to determine the velocity.
Learn more about velocity here:
https://brainly.com/question/26367289
