Why do trucks have so many transmission gears?
In: 354
But this time like you’re actually 5:
Imagine that accelerating up to highway speed is like climbing a ladder, and the rungs of the ladder are like the gears of the transmission. Each one allows you to reset your feet and take another step up. For a truck which is very, very heavy, the rungs of the ladder need to be very close together, so that the truck doesn’t need to take long upward steps. It can take tiny little steps at a time, and eventually, after lots of those steps, get all the way to the top of the ladder without pulling a muscle (blowing a head gasket).
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