Screwjack

Concept Overview

1. Simple Machines (Screw and Lever)
2. Mechanical Advantage

Lecturer Procedure

Steps to Follow

1. Insert lever into opening.
2. Turn horizontally.

Expected Result

Screwjack will rise vertically.

Historical References; Taken from original work of Percy H. Carr, 1970 

“If one cares to discuss mechanical advantage, it is better to have the device than to draw its picture or to carry on the discussion in the abstract. Many interested students have never been allowed to examine a jack of this type at close range, so should be invited to look it over after formal class.”