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+// Example 5_7
+clc;funcprot(0);
+// Given data
+V_f=250;// The speed of flight in m/s
+rho_a=0.4;// The density of air in kg/m^3
+A_in=1;// The inlet area in m^2
+m_f=2;// The mass flow rate of fuel in kg/s
+V_e=500;// The speed of exhaust jet in m/s
+
+// Calculation
+m_in=rho_a*V_f*A_in;// The mass flow rate of air at inlet in kg/s
+m_out=m_in+m_f;// The mass flow rate of air at outlet in kg/s
+F=(m_out*V_e)-(m_in*V_f);// The force exerted on the engine by the airframe in N
+printf("\nThe value of the force F exerted on the engine by the airframe is %1.1e N",F);
+
+