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+clc;clear;
+//Example 4.3
+//electron projected at an angle into a uniform electric field
+//given values
+v1=4.5*10^5;//initial speed in m/s
+alpha=37*%pi/180;//angle of projection in degrees
+E=200;//electric field intensity in N/C
+e=1.6*10^-19;//in C
+m=9.1*10^-31;//in kg
+a=e*E/m;//acceleration in m/s^2
+t=2*v1*sin(alpha)/a;//time in s
+disp(t,'time taken by electron to return to its initial level is:')
+H=(v1^2*sin(alpha)*sin(alpha))/(2*a);//height in m
+disp(H,'maximum height reached by electron is:')
+s=(v1^2)*(2*sin(alpha)*cos(alpha))/(2*a);//displacement in m
+disp(s,'horizontal displacement(in m)when it reaches maximum height is:')
+\ No newline at end of file