Please answer the following question: I am testing my students' logic. What is the answer they should choose between "sandpaper" and "piece of glass"? Logic test: Shiloh rolls a ball over a piece of sandpaper and notices that the ball moves very slowly. Shiloh then rolls his ball over a piece of glass, and the ball rolls very quickly. The ball rolled quickly on the piece of glass because the glass had (A) more friction (B) less friction.
A:
piece of glass