Al Tobias (wat4y) - Office: Gibson S123 & Physics 218, (434) 924-0538
Demonstrations are cataloged according to PIRA Bibliography
PLEASE REQUEST DEMOS WELL IN ADVANCE
Due to Physics Building renovations, the lead time to set up demo requests has increased due to the need to transport equipment across campus. Please be kind and let me know well ahead of time what you need.
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Rope and Three Students
Purpose:To demonstrate the effect of a small force through a large distance.
Two large students pull on the ends of a rope and a small student deflects the rope in the middle pulling the large students together.
Have two powerful students stretch the rope between them and put as much tension on it as they can. Have a frail student come to the middle of the rope and quickly press down with one finger. The large and powerful students will be pulled off balance as they try to unsuccessfully prevent the center of the rope from being deflected onto the floor.
Reference below: The Physics Teacher 9, 148 (1971)