Human reaction time is usually about 0.18 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)32 cm.
B)88 cm.
C)1.6 cm.
D)180 cm.
E)16 cm.

Question

Human reaction time is usually about 0.18 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)32 cm.
B)88 cm.
C)1.6 cm.
D)180 cm.
E)​16 cm.

Quizplus · Accepted Answer

The distance that the ruler falls before being caught can be calculated using the formula:

distance = 1/2 * acceleration * time^2

We know that human reaction time is approximately 0.18 seconds, and we can assume that the ruler will fall due to the acceleration due to gravity (9.8 m/s^2).

Plugging in these values, we get:

distance = 1/2 * 9.8 m/s^2 * (0.18 s)^2

distance ≈ 0.16 meters ≈ 16 cm (rounded to the nearest value)

Therefore, the best choice is E.

Human Reaction Time Is Usually About 0