Question NO.9 9.
An overhead travelling crane lifts a load from the
ground with an upward acceleration of al. At the
same time the hook of the crane carrying the load
moves in a horizontal direction with an acceleration a2
relative to the crane. Besides, the crane runs on its
rails with a constant speed vo. The initial speed of the
hook relative to the crane is zero. Find the speed of
the load with respect to the ground when it reaches
