1M20.36 - Work of a Screw

Set up the apparatus as shown. By applying pressure with the screw jacks you can break the boards.
Code Number:
1M20.36
Demo Title:
Work of a Screw
Condition:
Excellent
Principle:
Work and Power
Area of Study:
Mechanics
Equipment:
Two Screw Jacks and handles, Jack Stand, Wooden Blocks.
Procedure:

Set up the apparatus as shown. By applying pressure with the screw jacks you can break the boards.

References:
  • Ole Anton Haugland, "Students Learning Physics While Lifting Themselves: A Simple Analysis of a Scissors Jack", TPT, Vol. 55, #2, February 2017, p. 94-95.
  • Edwin F. Meyer III, "A Simple Machine in Action", TPT, Vol. 33, # 1, Jan. 1995, p. 28.
  • Lora Wilhite, "Good Lessons from Simple Machines", TPT, Vol. 16, # 9, Dec. 1978, p. 645.
  • Thomas B. Greenslade, Jr., "Photo - Inclined Plane Model", AJP, Vol. 77, # 7, July 2009, p. 609.
  • Borislaw Bilash II, “Turning, Turning, Turning“, A Demo A Day – A Year of Physical Science Demonstrations, p. 258.


Disclaimer: These demonstrations are provided only for illustrative use by persons affiliated with The University of Iowa and only under the direction of a trained instructor or physicist.  The University of Iowa is not responsible for demonstrations performed by those using their own equipment or who choose to use this reference material for their own purpose.  The demonstrations included here are within the public domain and can be found in materials contained in libraries, bookstores, and through electronic sources.  Performing all or any portion of any of these demonstrations, with or without revisions not depicted here entails inherent risks.  These risks include, without limitation, bodily injury (and possibly death), including risks to health that may be temporary or permanent and that may exacerbate a pre-existing medical condition; and property loss or damage.  Anyone performing any part of these demonstrations, even with revisions, knowingly and voluntarily assumes all risks associated with them.