Back to Discipline
- Let go of a wooden block in a smooth bowl. It slides up the other side.
- Let go of it in a rough bowl, and it does not reach as high up.
Of course not. The rough surfaces counteracts the sliding.
- Now, let a marble roll in a smooth bowl. It sways up an down along the sides.
- Let a marble roll in a rough bowl and it also sways up an down, but now it reaches higher up!