eli5 Why do trains with steel wheels have traction on steel rails, but if your brakes on your car are used up and become steel on steel they dont work anymore?
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Trains have very little traction compared to a car, it’s why they take so long to speed up or slow down, and why they have such problems climbing hills.
When your car takes a mile to come to a stop, you call that the brakes not working. When a train takes a mile to come to a stop, that’s normal.
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