1K20.20 • Friction: Area Dependence of Friction

Location: Floor Demo

Photos show the demonstration used at the University of Texas at Austin.

---

Instructions / Notes:

• The demo is supplied with an inclined plane, a spring scale along with either an aluminum or wooden block and a string.
• Start the demonstration with the inclined plane set in the level position.
• Slide the block by pulling on the spring scale with a smooth steady motion.

---

Demo Staff:

• Include a spring scale that is appropriate for the wooden block or the aluminum block.

Last updated on February 24, 2025