Explain why worn shock absorbers can make a car fail its annual MOT (an annual check in which about 30 safety items are checked.  It is illegal to drive a car without a current MOT).

The car is dangerous to drive (P)

because the shock absorbers are not damping (P) the oscillations

caused when the car hits a bump (P).

If the bumps occurred at the natural frequency (P) of the springs,

the car would bounce wildly (P) and could go out of control.