what is the physical interpretation of poles and zeros of a mechanical system?

what is the physical interpretation of poles and zeros of a mechanical system? I'm asking things like the meaning if I have only 0 or only complex numbers. And about the number of the poles and zeros, it should be equal? What can I infer about the stability?

• Do you mean you want to look at the poles and zeros of a mechanical system and make judgements about how it will act? Or do you mean you want to map back from the poles (and possibly zeros) in a transfer function to the motors, gears, wheels, and whatnot in your mechanical system? Jan 2 '20 at 19:08