Grand prix race cars have active suspension. This means that they use a computer to control the suspension and react to bumps.
The demonstration(right) shows how this works.
The computer can pump more or less hydraulic fluid into a cylinder on the suspension. This makes the spring stiffer or softer.
By controlling the stiffness of the spring on each wheel, the computer can stop the car tilting as it corners or accelerates. This improves roadholding.
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