PREVIOUS ANSWERS ASK YOUR TEACHER PRACTICE ANOTHER The magnitude of a velocity vector is called speed. Suppose that a wind is blowing from the direction N 450 W at a speed of 30 km/h. (This means that the direction from which the wind blows is 450 west of the northerly direction.) A pilot is steering a plane in the direction N 60 E at an airspeed (speed in still air) of 150 km/h. The true course, or track, of the plane is the direction of the resultant of the velocity vectors of the plane and the wind. The ground speed of the plane is the magnitude of the resultant. Find the true course and the ground speed of the plane. (Round your answers to one decimal place.) true course N 44 5 X E ground speed 144 9 X km/h Need Help? Read It