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+//Example 7.5: Acceleration
+clc;
+clear;
+close;
+//given data :
+S=1;// in km
+Vs=30;// in km/h
+Ts=(S*3600)/Vs; // in sec
+D=20;// duration of stop in sec
+T=Ts-D;// in sec
+Va=(S*3600)/T;// Average speed in km/h
+Vm=1.25*Va;// Maximum speed in km/h
+beta1=3;// braking retardation in km/h/sec
+A=((Vm*T)-(S*3600))/Vm^2;
+B=1/(2*beta1);
+alfa=1/(2*(A-B));
+disp(alfa,"The Acceleration,alfa(km/h/sec) = ")