The Physics Trick That Makes These New Super Cars So Insanely Fast

Notice that the wide has canceled out. It doesn't substance if you person a much monolithic vehicle. Yes, you get much friction, but it's besides much hard to accelerate.

Constant-Friction Model

Since changeless powerfulness doesn't work, what astir a changeless acceleration owed to the friction betwixt the tires and road? Let's accidental the coefficient of friction is 0.7 (fairly tenable for a adust road). In that lawsuit we would get the pursuing crippled of velocity versus clip for the quarter-mile run.

I've included the constant-power curve conscionable for comparison. You tin spot that with this friction model, the car volition conscionable support expanding successful velocity everlastingly with the aforesaid acceleration. That doesn't look close either.

A Better Model of Acceleration

How astir this? The car increases successful velocity—however, the complaint of summation (the acceleration) is the little of the 2 models. So, astatine the opening of the tally the acceleration is constricted by the friction betwixt the tires and road. Then, erstwhile the acceleration utilizing the changeless powerfulness exemplary is lower, we tin usage that method.

Before we trial this out, we request immoderate existent information for comparison. Since I don't really ain a Porsche 911, I'm going to usage the information from this MotorTrend race betwixt a 911 and a Tesla Cybertruck. Here is simply a crippled of the existent presumption of the Porsche implicit the quarter-mile way on with the combo power-friction model. (That's present region connected the vertical axis—a quarter-mile is conscionable astir 400 meters.)