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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 : 5.5 :
+// Page number 781-782
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+r = 1.0    // Tractive resistance(N/tonne)
+
+// Calculations
+tractive_res_i = 0.278*r     // Tractive resistance(N/tonne) = Energy consumption(Wh/tonne-km)
+beta = 1/277.8               // Tractive resistance(N/tonne) = Retardation(km kmps/tonne)
+energy = 98.1*1000/3600      // 1% gradient = energy(Wh per tonne km)
+
+// Results
+disp("PART IV - EXAMPLE : 5.5 : SOLUTION :-")
+printf("\nCase(i)  : Tractive resistance of 1 N per tonne = %.3f Wh per tonne-km", tractive_res_i)
+printf("\nCase(ii) : Tractive resistance of 1 N per tonne = %.5f km phps per tonne", beta)
+printf("\nCase(iii): 1 percent gradient = %.2f Wh per tonne km\n", energy)
+printf("\nNOTE: Slight change in the obtained answer from that of textbook is due to more precision here")