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+// Example 5.4
+// Computation of (a) Amount of torque that must be removed from the motor 
+// shaft to maintain 1760r/min (b) Expected minimum startimg torque for the 
+// lower voltage (c) Percent change in developed torque caused by 10% drop in 
+// system voltage.
+// Page No. 185
+
+clc;
+clear;
+close;
+
+// Given data
+
+hp=50;              // Horsepower
+n=1760;             // Rated speed of machine
+v1=460;
+
+
+// (a) Amount of torque that must be removed from the motor shaft to maintain 
+// 1760r/min
+v2=v1*0.90;
+Trated=hp*5252/n;       //Rated torque 
+TD2=Trated*(v2/v1)^2;
+Treduction=Trated-TD2;
+
+// (b) Expected minimum startimg torque for the lower voltage
+
+Tlr=1.40*Trated;
+Tlr2=Tlr*(v2/v1)^2;
+
+// (c) Percent change in developed torque caused by 10% drop in system voltage
+
+Tchange=(TD2-Trated)/Trated;
+Tchanger=(Tlr2-Tlr)/Tlr;
+
+// Display result on command window
+printf("\n Amount of torque that must be removed from the motor shaft = %0.1f  lb-ft",Treduction);
+printf("\n Expected minimum starting torque for the lower voltage = %0.1f lb-ft ",Tlr2);
+printf("\n Percent change in developed torque = %0.0f Percent ",Tchanger*100);