Kitties and Physics (Video Relfection)

In the video I watched, there were these kitties and they were trying to run up a slide. However, they failed and ended up running in place. This happened because the slide is totally smooth. There is no friction on the slide therefore they could not move upwards. The friction would have allowed the kitties to move because the surface would not have been smooth, therefore allowing the movement. Besides that the kitties were utterly adorable. I wanted to hug the computer screen.