EXAMPLES 245 



(8) A uniform pipe, 200 feet long, is fitted with a plunger which, 

 originally moving at 6 feet per second, is brought to rest uniformly in 

 1*5 second. Assuming the water to be incompressible, determine the 

 pressure on the piston caused by the retardation. 



Answer. 10*76 Ibs. per square inch. 



(9) If, in the above example, the plunger is driven from a crank 1 foot 

 long, and making 100 revolutions per minute, and with S. H. motion, 

 determine the pressure produced by retardation at the end of the stroke. 



Answer. 295 Ibs. per square inch. 



