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+//developed in windows XP operating system 32bit
+//platform Scilab 5.4.1
+clc;clear;
+//example 11.10w
+//calculation of the stretch produced in the spring
+
+//given data
+d=1*10^-2//stretch(in m) of the spring
+R=6400*10^3//radius(in m) of the earth
+h=800*10^3//height(in m) above the earth's surface
+
+//calculation
+//The extension in the spring on the surface is 
+//1*10^-2 = (G*M*m)/(k*R^2)...........(1)
+//The extension in the spring at height h above the surface
+//x = (G*M*m)/(k*(R+h)^2).............(2)
+//from above equations,we get
+x=d*((R^2)/(R+h)^2)
+
+printf('the stretch produced in the spring is %3.2f cm',x*10^2)