Academic journal article The Science Teacher

Reaction Time ... Adapted from MOTION #21 by TOPS Learning Systems

Academic journal article The Science Teacher

Reaction Time ... Adapted from MOTION #21 by TOPS Learning Systems

Article excerpt

1. Rest your arm on a table, with your hand beyond the edge. Have a friend hold a meter stick between your open thumb and forefinger at the 50 cm mark.

[ILLUSTRATION OMITTED]

2. Ask your friend to drop the stick without warning. Try to catch it by pinching your fingers together.

3. A meter stick falls d centimeters in t seconds, according to this equation:

a. Calculate your fastest reaction time; your average reaction time.

b. What is the slowest reaction time your meter stick can possibly record?

[c] 2008 by TOPS Learning Systems. Photocopies permitted if this notice appears. All rights reserved.

OBJECTIVE

To measure reaction time by catching a dropped meter stick.

LAB NOTES

Make a photocopy of the activity above for each student or lab team.

Step 2. The "dropper" should give no clues suggesting the moment of release. A slow easing of grip on the meter stick allows it to fall without warning.

The "catcher" should call "ready" before each trial. The best place to watch the meter stick is at the top.

EVALUATION

Q. Drop a dollar bill instead of a meter stick. …

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