Question: If I run my finger across a sheet of plain paper and a sheet of sand paper, which will have greater friction?
Choices:
text: the plain paper
label: A
text: the sand paper
label: B
text: neither has friction
label: C
text: the same friction
label: D
Answer: B
Fact: as the roughness of something increases , the friction of that something will increase when its surface moves against another surface