The iPhone 3G, with its accelerometers and GPS chip, has spawned a unique category of programs in the App Store: automobile performance measurement tools. These programs use the iPhone’s GPS chip to ...

The lateral acceleration force in automobile known as centrifugal force or g-force is being measured by this meter. The lateral acceleration force in automobile known as centrifugal force or g-force ...

One of the cooler additions to the new Nissan GT-R is its multifunction computer, which among other things can tell you exactly how many G's you're experiencing as you fling it around the Nürburgring.