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+//developed in windows XP operating system 32bit

+//platform Scilab 5.4.1

+clc;clear;

+//example 11.13w

+//calculation of the speed and the angular speed of the satellite S2 relative to the satellite S1

+

+//given data

+T1=1//period of revolution(in h) of satellite S1

+T2=8//period of revolution(in h) of satellite S2

+R1=10^4//radius(in km) of the orbit of satellite S1

+

+//calculation

+//by Kelpler's third law

+//(R2/R1)^3 = (T2/T1)^2

+R2=R1*(((T2/T1)^2)^(1/3))

+v1=(2*%pi*R1/T1)//speed(in km/h) of satellite S1

+v2=(2*%pi*R2/T2)//speed(in km/h) of satellite S2

+v=abs(v2-v1)//speed of satellite S2 with respect to satellite S1

+w=v/(R2-R1)//angular speed of satellite S2 as observed by an astronaut in satellite S1

+

+printf('the speed of the satellite S2 with respect to the satellite S1 is %3.1e km/h',v)

+printf('\nthe angular speed of the satellite S2 as observed by an astronaut in the satellite S1 is %3.2f rad/h',w)