4B60.53 - Visualizing Heat from Friction
Show the difference in heat transfered to blocks rubbed together quickly vs. blocks rubbed togethter slowly.
Rub one set of blocks togehter slowly while press hard for 5 seconds. Carefully place them with out touching the sides which were rubbed together in front of the IR camera. Rub the next set together quickly while pressing just as hard. Carefully place them next to the last set. Notice that quickly rubbed blocks are hotter.