a. An aircraft that can travel at 300 km h 1 attempts to fl y due south in a westerly cross-wind of 50 km h 1 . What is the resultant velocity of the aircraft?
b. A shaft rotates in a bearing with a tangential speed of 1.5 m s 1 whilst moving axially at a speed of 0.8 m s 1 . What is the resultant sliding velocity of the shaft?