Question 1198189
.


The method of solution is to apply the mechanical energy conservation law,


but when the input data is given in feet and lbs,  it generates disgust instead of enthusiasm.



In  Physics,  it is just  LONG  TIME  (at least  60  years (!) )  nobody solves such problems using such obsolete units.



Feet and pounds are still good in the US in stores  (unfortunately,  since they are not used anywhere more 

in the world,  even in the old  Great  Britain),  but not in  Physics and not in education,  in general.



            **************************************************************************


                  Do not try to revive a corpse,  which is not alive just more than  60  years.


            **************************************************************************