In Sec. 8.4, the phase angle between the forced vibration caused by the rough road and the motion of the car is given by

In Sec. 8.4, the phase angle Ф between the forced vibration caused by the rough road and the motion of the car is given by

tan Φ = 2(c/c_c) (w/p)/1 – (w/p)²

As a mechanical engineer, you would like to know if there are cases where Ф = ω/3 – 1. Use the other parameters from the section to set up the equation as a roots problem and solve for ω.