An airplane is flying at a velocity of 79 m/s eastward relative to the air. Due to a high-pressure region to the north, the velocity of the air relative to the ground is 18 m/s southward. Find the ground speed of the airplane.
So we are working out it’s final velocity. To do this you need to rearrange and substitute : Velocity = final velocity (v) - initial vel. (U) Divided by ______________________ Time taken (t)