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+//Example 13 // Time period
+clc;
+clear;
+close;
+//given data :
+M=4;// in kg
+R=0.10;// in m
+I=(2/5)*M*R^2;// in kg.m^2
+C=4*10^-3;// in Nm/radian
+T=2*%pi*sqrt(I/C);
+disp(T,"Time period,T(s) = ")
+// answer is wrong in textbook