All four types of frictions are demonstrated through the simple act of riding a bike. Friction demystified! The students who created this were from Mrs. Dimas' Physics class at Santa Teresa High School in San Jose.
Mysterious depressions have been found in the Willamette Valley. This presentation explains how they were formed, how they were found, and what these holes in the ground have to do with friction.
These flashcards are here to help you better understand middle school physical science.