Suppose you are riding a bicycle. If you want to waste as little energy as possible while the bike is in motion, what type of friction should exist between the bike and the road?
A) Static
B) Sliding
C) None
D) Can't tell

Question

Quizplus · Accepted Answer

Static friction is necessary for the bike to move forward without slipping. It provides the grip needed for the tires to roll on the road, converting the pedaling force into forward motion efficiently.

Suppose You Are Riding a Bicycle