Work is achieved when an object/particle is acted upon a force and is displaced for a certain distance. Much more, for this case the work is the potential energy which is:
#W = mg(\Deltah)=Fd#
#W = (14kg)(9.81m/s^2)(54m-0m)#
# 7416.35999997 (kg\cdotm^2)/s^2 or 7416.36 J #