Calculate the problem in Example by using the Runge-Kutta computer program RUNGA (see Chapter 8).
Example
Use the digital computer to solve the problem of a spring-mass system excited by a triangular pulse. The differential equation of motion and the initial conditions are given as
[ 0.5x"+8Π2x=F(tx1=x'1=0) ]
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The triangular force is defined in Figure.