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What is your reaction time? The following simple method can be employed to determine reaction time. A partner holds a meterstick by pinching it at the top and letting it hang vertically. To measure your reaction time, place your thumb and forefinger just below the base of the meterstick, ready to pinch it when it falls. Without signaling, your partner releases the meterstick; it accelerates due to gravity at a rate of , and you grab it as fast as possible.
(a) If your thumb pinches the meterstick at the mark, what was your reaction time? Using a similar calculation, one can calibrate a "Grab-it Gauge" such as that shown in the given figure.
(b) Calculate the distance to draw each line from the bottom starting point for reaction times of , and .