Smack these two balls together with a paper between them. The heat transfer from the collision burns a hole in the paper. The collision between the two balls is nearly elastic, with some kinetic energy loss due to heat and sound generation.
A closer look at the burned hole in the paper:
Smack these two balls together with a paper between them. The heat transfer from the collision burns a hole in the paper. The collision between the two balls is nearly elastic, with some kinetic energy loss due to heat and sound generation.
A closer look at the burned hole in the paper: