| # | Concept | Culture | Statement | Freq. |
|---|---|---|---|---|
| 1 | friction | Physics education in Western countries | Friction is a force that opposes the relative motion or tendency of such motion of two surfaces in contact. | 1 |
| 2 | friction | physics education | Friction is a force that opposes the relative motion or tendency of such motion of two surfaces in contact. | 1 |
| 3 | friction | physics education | Friction is a force that opposes the motion of objects and causes energy to be converted into heat. | 1 |