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I need some help figuring out how to proceed.

1. The problem statement, all variables and given/known data

Make up a ruler, that can measure human reaction time in time intervals of 0.05s. There supposed to be 6 intervals in total.

We did a similar experiment in class, where a student drops a ruler and I need to catch it as fast as I can. The displacement (cm as shown on the ruler) was 17cm.

3. The attempt at a solution

I used a uniform acceleration equation: displacement = (Initial Velocity)(change in time) + 1/2(Acceleration due gravity)(change in time)^2

and found the time to be 0.18s for the 17 cm.

So now I need to make a ruler that will calculate time instead of displacement.

However I don't know what values to use every 0.05s on the ruler.

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# Homework Help: Human Reaction Time

Can you offer guidance or do you also need help?

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