Exercises: 6.5 (5, 6 and 9 only), and 6.8 (A6 only).
Project problem: Consider the differential equation

The solution for the case where the initial conditions at t=0 are zero and f(t) is zero for t<0 and 1 for t>=0 is illustrated below. Determine the natural frequency, damping ratio and the value of the constant F.
