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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 : 5.6 :
+// Page number 782
+clear ; clc ; close ; // Clear the work space and console
+
+// Given data
+W = 254.0      // Weight of motor-coach train(tonne)
+no = 4.0       // Number of motor
+t_1 = 20.0     // Time(sec)
+V_m = 40.25    // Maximum speed(kmph)
+G = 1.0        // Gradient(%)
+gamma = 3.5    // Gear ratio
+n = 0.95       // Gear efficiency
+D = 91.5/100   // Wheel diameter(m)
+r = 44.0       // Train resistance(N/tonne)
+I = 10.0       // Rotational inertia(%)
+
+// Calculations
+W_e = W*(100+I)/100                  // Accelerating weight of train(tonne)
+alpha = V_m/t_1                      // Acceleration(km phps)
+F_t = 277.8*W_e*alpha+W*r+98.1*W*G   // Tractive effort(N)
+T = F_t*D/(2*n*gamma)                // Torque developed(N-m)
+T_each = T/no                        // Torque developed by each motor(N-m)
+
+// Results
+disp("PART IV - EXAMPLE : 5.6 : SOLUTION :-")
+printf("\nTorque developed by each motor = %.f N-m\n", T_each)
+printf("\nNOTE: Changes in the obtained answer from that of textbook is due to more precision here & more approximation in textbook")
+printf("\n      ERROR: W = 254 tonne, not 256 tonne as mentioned in textbook problem statement")