Mechanics: Walking the Spool

PIRA Class: 1K10.30

Purpose:
A surprising demo that provides a good application of combining force and torque equations.

Description:
A spool with string wrapped around the spindle. If you pull on the string when it is parallel to the table the spool will roll toward you. If you pull on the ribbon at an angle almost perpendicular to the table the spool will roll away from you.

Equipment:
Spool with wrapped string

Location:
Shelf 122