Cars & Transportation » Aircraft » Is there a speed limit for airplanes?

Is there a speed limit for airplanes?

I was just wondering because just recently i traveled on an airplane and mid-flight it felt like the plane was coming to a stop just like in a car, but i'm guessing that the pilot was just slowing down. It kind of freaked me out but it also got me wondering, is there actually a speed limit?

thanks for the answers :)

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