12 Days of Geek | Day 4 | That simply is not a simple machine Dec 07, 2015 by Julian Fields in 12 Days of Geek Q. Which of these is not one of the six classic simple machines? A simple machine is a mechanical device that changes the direction or magnitude of a force. They act as the simplest ways to use mechanical advantage to multiply force. There are six classic simple machines: Lever Wheel and axle Pulley Inclined plane Wedge Screw A spring, however, is not one of them.Now that you’ve been schooled on simple machines, it’s time to enroll at Lifesize University to learn everything there is to know about cloud video conferencing. Live sessions are held every Tuesday and Thursday to teach the basics of using and administrating Lifesize Cloud and to answer any questions you have about your implementation. Check out Lifesize University on the community for all the details.