Hold the index finger and thumb of your dominant hand about 2.5 cm apart, and ha
ID: 250977 • Letter: H
Question
Hold the index finger and thumb of your dominant hand about 2.5 cm apart, and have a friend hold a ruler vertically in the space between your fingers and thumb. Note the position of the ruler relative to your index finger. Your friend must release the ruler, and you must catch it (without moving your hand downward) as quickly as you can. The ruler is in free fall. It falls a distance d = ½ g t2, where t is the reaction time and g = 9.80 m/s2. Repeat the measurement of d five times, average your results, and calculate the average value of t.
Explanation / Answer
Average distance = (3.21+2.33+4.24+3.54+2.83)/5 = 3.23m.
Thus value of t = square root of (2*d/g) = 0.812 seconds.
time ( in seconds) distance = 1/2gt^2(in m) 0.81 3.21 0.69 2.33 0.93 4.24 0.85 3.54 0.76 2.83Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.