def calculate_motive_powers(motive_forces, velocities):
    """
    Calculates motive power [kW].

    :param motive_forces:
        Motive forces [N].
    :type motive_forces: numpy.array | float

    :param velocities:
        Velocity vector [km/h].
    :type velocities: numpy.array | float

    :return:
        Motive power [kW].
    :rtype: numpy.array | float
    """
    return motive_forces * velocities / 3600
