A stream of water flowing horizontally with a speed of 15 m s'1 gushes out of a tube of cross-sectional area 10-2 m_(2) and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water assum ing it does not rebound ?

A stream of water flowing horizontally with a speed of 15 m s'1 gushes

1.	A stream of water flowing horizontally with a speed of 15 m s'1 gushes out of a tube of cross-sectional area 10-2 m_(2) and hits a vertical wall nearby. What is the force exerted on the wall by the impact of water assum ing it does not rebound ?
Answer» Solution :Velocityof flowwaterv = 15`ms^(-1)` Areaof cross sectionof tube A = `10^(2)ms^(2)` Volumeof liquidflowingthroughtubeenerysecond `V=Av ` `10^(2)xx 15 ` `=15 xx 10^(2) m^(3) //s` DENSITY of WATERP = `10^(3) kgm^(-3) ` `m= pv ` `150kg//s` FORCEACTINGON walldueto impactof water = changein momentumeverysecond `= mv ` `=2250 N`