Can cats run as fast as cheetahs?

Depends on what you mean.

Cheetahs are considered a cat specie - so Cheetahs ARE cats. Which makes cast as fast as Cheetahs.

OTOH the particular cat specie known as the Cheetah is the fastest land animal. No other cat, or any other land specie is as fast as the Cheetah.

Your regular domestic pet cat is a lot slower than a Cheetah.