Stimatore Tempo di Reazione — Formula

How the Ruler Drop Test Works

Formula

Reaction Time = sqrt(2 x Distance / g)

Where distance is in meters and g = 9.81 m/s^2. The result is in seconds; multiply by 1000 for milliseconds.

How to Perform the Test

1. Have a partner hold a ruler vertically at the 0 cm mark between your open thumb and finger. 2. Without warning, the partner drops the ruler. 3. Catch it as quickly as possible and read the cm mark where you caught it.

Benchmarks

Reaction TimeRating < 150 msExcellent 150-200 msGood 200-250 msAverage 250-300 msBelow average > 300 msSlow

Esempio Risolto

The ruler fell 15 cm before being caught.

  1. Distance in meters = 15 / 100 = 0.15 m.
  2. Reaction time = sqrt(2 x 0.15 / 9.81) = sqrt(0.0306) = 0.175 sec.
  3. In milliseconds = 175 ms.
  4. Rating: Good (150-200 ms range).