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+//Fluid system - By - Shiv Kumar
+//Chapter 2 - Impact of Jet
+//Example 2.19
+      clc
+     clear
+     
+//Given Data:-
+        d=40;     //Diameter of the Jet, mm
+        V=24;     //Velocity of the Jet, m/s
+
+//Data Used:-
+     rho=1000;     //Density of water, kg/m^3
+
+//Computations:-
+        d=d/1000;       //m
+        a=(%pi/4)*d^2;      //cross-sectional area of Jet, m^2
+   //CaseI - Jet strikes normal to a fixed plate
+     //(a)
+        Fx=rho*a*V^2;      //N
+     //(b)Work done, W
+        W=0;     //As there is no motion of flat plate
+     //(c)
+        eta=0;         //Hydraulic efficiency is zero
+        
+//Result I:-
+     printf("Case I:  \n\t")
+     printf("(a)Force exerted by Jet on the Plate in direction of Jet, Fx=%.2f N  \n\t", Fx)      //The answer vary due to round off error
+     printf("(b)Work done by Jet per second=%.2f N \n\t", W)      //The answer vary due to round off error
+     printf("(c)Hydraulic efficiency of the Jet, eta_H=%.2f percent \n\n", eta)      //The answer vary due to round off error
+  //Case II - Jet strikes the moving plate
+         u=10;          //Velocity of moving flat plate, m/s
+    //(a)
+         Fx=rho*a*(V-u)^2;         //N
+    //(b)
+         W=Fx*u;       //N-m/s
+    //(c)
+         eta=2*W/(rho*a*V^3)*100;        //In percentage
+  //Result II
+     printf("Case II: \n\t")
+     printf("(a)Force exerted by Jet on the Plate in direction of Jet, Fx=%.2f N  \n\t", Fx)      //The answer vary due to round off error
+     printf("(b)Work done by Jet per second=%.2f N \n\t", W)      //The answer vary due to round off error
+     printf("(c)Hydraulic efficiency of the Jet, eta_H=%.2f percent \n\n", eta)      //The answer vary due to round off error
+  //Case III - Jet strikes a series of flat moving plate
+          u=10;         //velocity of flat plate, m/s
+     //(a)
+          Fx=rho*a*V*(V-u);          //N
+     //((b)
+          W=Fx*u;           //N-m/s
+     //(c)
+          eta=W*2/(rho*a*V^3)*100;        //In percentage
+  //Result III
+
+     printf("Case III: \n\t")
+     printf("(a)Force exerted by Jet on the Plate in direction of Jet, Fx=%.3f N  \n\t", Fx)      //The answer vary due to round off error
+     printf("(b)Work done by Jet per second=%.2f N \n\t", W)      //The answer vary due to round off error
+     printf("(c)Hydraulic efficiency of the Jet, eta_H=%.2f percent \n\n", eta)      //The answer vary due to round off error
+     
+