Human reaction time is usually about 0.24 s.If your lab partner holds a ruler between your finger and thumb and releases it without warning,how far can you expect the ruler to fall before you catch it? The nearest value is:

A) 56 cm.
B) 118 cm.
C) 2.8 cm.
D) 235 cm.
E) 28 cm.

Question

Human reaction time is usually about 0.24 s.If your lab partner holds a ruler between your finger and thumb and releases it without warning,how far can you expect the ruler to fall before you catch it? The nearest value is:
​
A) 56 cm.
B) 118 cm.
C) 2.8 cm.
D) 235 cm.
E) ​28 cm.

Quizplus · Accepted Answer

The distance fallen can be calculated using the formula for free fall: $ d = \frac{1}{2}gt^2 $, where $ g \approx 9.8 \, \text{m/s}^2 $ and $ t = 0.24 \, \text{s} $. Plugging in the values, $ d = \frac{1}{2} \times 9.8 \times (0.24)^2 \approx 0.28 \, \text{m} $, which is 28 cm.

Human Reaction Time Is Usually About 0