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clc
//to calculate velocity of rocket
//lo be the length at rest
l=99/100 //length is 99 per cent of its length at rest is l=(99/100)lo
c=3*10^8 //light speed(m/s)
v=sqrt(c^2*(1-l^2)) //formula is v=c sqrt(1-(l/lo)^2)
disp("velocity of rocket is v="+string(v)+"m/s")
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