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+// A Texbook on POWER SYSTEM ENGINEERING
+// A.Chakrabarti, M.L.Soni, P.V.Gupta, U.S.Bhatnagar
+// DHANPAT RAI & Co.
+// SECOND EDITION 
+
+// PART IV : UTILIZATION AND TRACTION
+// CHAPTER 5: ELECTRIC TRACTION-SPEED TIME CURVES AND MECHANICS OF TRAIN MOVEMENT
+
+// EXAMPLE : 5.3 :
+// Page number 778-779
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+speed = 25.0       // Scheduled speed(kmph)
+D = 800.0/1000     // Distance between 2 stations(km)
+t = 20.0           // Time of stop(sec)
+V_m_per = 20.0     // Maximum speed higher than(%)
+beta = 3.0         // Retardation(km phps)
+
+// Calculations
+t_total = D*3600/speed                                 // Total time of run including stop(sec)
+T = t_total-t                                          // Actual time for run(sec)
+V_a = D/T*3600                                         // Average speed(kmph)
+V_m = (100+V_m_per)*V_a/100                            // Maximum speed(kmph)
+alpha = 1/((7200.0*D/V_m**2*((V_m/V_a)-1))-(1/beta))   // Value of acceleration(km phps)
+
+// Results
+disp("PART IV - EXAMPLE : 5.3 : SOLUTION :-")
+printf("\nRate of acceleration required to operate this service, α = %.2f km phps", alpha)