Which of the following is not a simple harmonic system.

[cychengad]

Homework Statement

a the balance wheel of a mechanical watch
b a tuning fork
c the shock absorber of your car
d a hanging spring with a small mass attached at the end

Homework Equations

The Attempt at a Solution

a is surely a SHM
d is a undamped spring-mass system undergoes simple harmonic motion
b and c are also a SHM searched from goole...
is a) a vibrational system?

 

[epenguin]

If a shock absorber is shm can you explain how it absorbs shocks?