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Laplace Transform Second Shifting Theorem Example
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Let u5(t)=u(t-5) be the unit step function with jump discontinuity at t=5. The differential equation IVP dy/dt + 6y = u5(t), y(0)=4 is best solved by using the Laplace Transform. We also need the so-called Second Shifting Theorem (Property), a.k.a. shifting on the t-axis property, as well as other properties of the Laplace Transform. The differential equation gets converted to an algebraic equation before the Inverse Laplace Transform and Shifting Theorem are used. The Second Shifting Theorem says that ℒ[u(t-a)f(t-a)]=e^(-a*s)F(s). This means the Inverse Laplace Transform of e^(-a*s)F(s) is u(t-a)f(t-a).
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