It's the other way around. Regardless of speed, it has the same number of particles to displace. At high speed these particles you're hitting are like hitting a

It's the other way around. Regardless of speed, it has the same number of particles to displace. At high speed these particles you're hitting are like hitting a concrete wall. The faster you go, the worse it is, and the less time you have to cool down the heat you're generating.