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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 : 5.12 :
+// Page number 784-785
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+W = 200.0       // Trailing weight(tonne)
+G = 1.0         // Gradient(%)
+alpha = 1.0     // Acceleration(km phps)
+u = 0.2         // Co-efficient of adhesion
+r = 50.0        // Train resistance(N/tonne)
+I = 10.0        // Rotational inertia(%)
+
+// Calculations
+W_L = ((277.8*(100+I)/100*alpha)+98.1*G+r)*W/(u*9.81*1000-((277.8*(100+I)/100*alpha)+98.1*G+r))  // Weight of locomotive(tonnes)
+
+// Results
+disp("PART IV - EXAMPLE : 5.12 : SOLUTION :-")
+printf("\nMinimum adhesive weight of a locomotive, W_L = %.1f tonnes\n", W_L)
+printf("\nNOTE: ERROR: Calculation mistake in textbook solution in calculating W_L")