Let's discuss the next problem: An unfortunated engineer has one heavy stone that has to be moved a small distance. Thus, he thinks of pushing it away by means of a water jet, pointing it towards stone centre of mass. But he has to types of jet available: -One has 50 bar of static pressure and 5 m/s of water velocity. -The other has 10 bar of static pressure and 89.5 m/s of water velocity. One jet has to be choosen in order to provide the neccesary force to push the stone a short distance, as engineer's boss is claiming all day it has to be done. What type of jet would you choose?.