An aircraft attempts to fly due north at 100km/h. What is it's resultant velocity

If there is no wind it is 100 km/h north

To determine the resultant velocity of the aircraft, we need to consider both the speed at which it is flying due north and any other factors that may affect its motion.

In this case, the aircraft is flying due north at a speed of 100 km/h. Since it is moving in a straight line without any other forces acting upon it, the resultant velocity will be the same as its initial velocity, which is 100 km/h in the north direction.

Therefore, the resultant velocity of the aircraft is 100 km/h due north.