plz solve it The figure shows a simple device for measuring your reaction time.
ID: 2131507 • Letter: P
Question
plz solve it
The figure shows a simple device for measuring your reaction time. It consists of a cardboard strip marked with a scale and two large dots. A friend holds the strip vertically, with thumb and forefinger at the dot on the right in the figure. You then position your thumb and forefinger at the other dot (on the left in the figure), being careful not to touch the strip. Your friend releases the strip, and you try to pinch it as soon as possible after you see it begin to fall. The mark at the place where you pinch the strip gives your reaction time, (a) How far from the lower dot should you place the 50.0 ms mark? How much higher should you place the marks for (b) 100, (c) 150, (d) 200, and (e) 250 ms? (For example, should the 100 ms marker be 2 times as far from the dot as the 50 ms marker? If so, give an answer of 2 times. Can you find any pattern in the answers?) Number Units Number Units Number Units Number Units Number UnitsExplanation / Answer
time = 50ms = 0.05 secs
s = 0.5*g*t^2 = 0.01226 m = 1.226 cms
for 50ms mark should be kept at 1.226 cms from the dot.
time = 100ms = 0.1 secs
s = 0.5*g*t^2 = 0.049m = 4.9cms = 4times that of 50ms
a) 1.226 cms
b) 4times of a
c) 9 times of a
d) 16times of a
e) 25 times of a
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