News for hackers. Stuff that matters.

A comment on Tesla ‘Easter Egg’ Makes the Fast-Accelerating Model S Even Faster. Parent comment

Re:Tesla ‘Easter Egg’ Makes the Fast-Accelerating Model S Ev... by LeifCarrotson on Thursday November 17, 2016 @08:18AM (#12977153)
> High school friction is wrong.

No, it's at least mostly correct. High school friction says

    F = mu * W
Where F is the output force, mu is the coefficient of friction, and W is the normal force (typically equal to the weight).

If it's failed you, it's failed in failing to mention that the tire-road interface can have a coefficient of friction greater than one, and in failing to mention that the normal force can be increased with aerodynamic downforce.

[ Parent | on HN ]
Re:Tesla ‘Easter Egg’ Makes the Fast-Accelerating Model S Ev... by jackmott on Thursday November 17, 2016 @08:24AM (#12977191)
High school physics tends to claim that the coefficient can't be greater than one.

Source: note all the people here who thought it couldn't be greater than one.

[ Parent | on HN ]
Re:Tesla ‘Easter Egg’ Makes the Fast-Accelerating Model S Ev... by hx87 on Thursday November 17, 2016 @10:21AM (#12978166)
How is that due to high school physics rather than naive intuition?
[ Parent | on HN ]
Re:Tesla ‘Easter Egg’ Makes the Fast-Accelerating Model S Ev... by Dylan16807 on Thursday November 17, 2016 @01:01PM (#12979752)
Mine never implied that, and I could have easily disproved it with the grippy pads on my giant calculator.
[ Parent | on HN ]