1. sliding friction is also known as _____ ?
A. down friction
B. pulling friction
C. increasing friction
D. dry friction

2. why do you think a basketball player wear sports shoes in the game?
A. it is trend and he wanted to look cool.
B. sports shoes are cheaper than leather shoes.
C. the basketball player wear sports shoes because it is lighter to wear
D. the basketball player wear sports shoes to have high gripping strength which adds friction to help him have good performance in the game​