5. A spring-mass-damper system has an effective mass of m+ a, a damping coefficient of b, and a stiffness coefficient of c. The system forcing can be described by F(t) Fo sin(wet + Ee). = Write the equation of motion for this system. What is the natural frequency of the system if the damping coefficient, b, was equal to zero? What is the difference between the natural frequency of the system and the fre- quency, we?