Q4 [LQ]
For a horizontal damped spring-mass system with parameters, mass = m, spring constant = k, and drag coefficient = b, is subject to a driving force given by F₀cos(ωt). Show that, for t ≫ 1/β, the time average over a period τ = 2π/ω of the kinetic energy of the system (T) = (1/τ)∫₀^(τ) (1/2)mẋ²dt is maximum when the driving frequency ω = ω₀ = √(k/m).