PIRA 1K10.30 Dynamic Torque: Walking the Spool

• Pull strap to the left so that it is horizontal to the surface of the table.

• Have students predict the direction the spool will turn when strap is pulled to the right.
  

• Angle between strap and table determines which direction the spool will roll.
  

• At some angle the spool will remain stationary.

Photo Shows the Demonstration Used by the University of Texas at Austin.

Drawing is by Courtesy of the University of Minnesota

Last Updated 2023 - University of Texas at Austin Physics Dept. - All Rights Reserved.