SME
Grade 6 Science · Problem type
Catching a falling ruler
Use this to record how far a ruler falls before you catch it.
Record and look
19
17
15
14
12
Try 1
Try 2
Try 3
Try 4
Try 5
Try 1
Try 2
Try 3
Try 4
Try 5
Catch distance (cm)
19
17
15
14
12
The catch distance fell from 19 cm to 12 cm.
With practice your brain and hand worked together faster, so you caught it sooner.
Tap a bar at the height you want.
Assumptions
•
A partner holds a ruler above your open hand and drops it without warning.
•
Your eyes sense the drop. Nerves carry the message to the brain, and the brain signals your hand.
•
A shorter catch distance means a faster reaction.
Topic check
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