[OC] Apparently the iPhone has a very sensitive accelerometer, so I used it to measure my car's performance. It revealed some interesting things, like how depressing the clutch causes a larger (negative) acceleration than the engine ever does, and the effects of engine braking.
from /r/dataisbeautiful
[OC]顯然，iPhone有一個非常敏感的加速度計，所以我用它來測量我的車的性能。它揭示了一些有趣的事情，比如踩下離合器會導致比發動機更大的（負）加速度，以及發動機制動的影響。