Which type of friction involves resistance to motion due to rolling?

Which type of friction involves resistance to motion due to rolling?

• A. Static Friction
• B. Kinetic Friction
• C. Centrifugal force
• D. Rolling Friction

Answer: (D)

Rolling friction is the resistance that opposes motion when an object rolls over a surface. It arises from how the wheel and the surface deform at the contact patch and from small losses as the contact area changes as it rolls. Because there isn’t sustained sliding at the contact, rolling friction is typically much smaller than sliding (static or kinetic) friction, which is why rolling is easier to sustain once motion has started. Static friction stops motion from beginning until a threshold is reached, while kinetic (sliding) friction acts when surfaces slide past each other. Centrifugal force, on the other hand, is a fictitious force that appears in rotating reference frames and is not a frictional interaction. So the type of friction involved with rolling is rolling friction.

Rolling friction is the resistance that opposes motion when an object rolls over a surface. It arises from how the wheel and the surface deform at the contact patch and from small losses as the contact area changes as it rolls. Because there isn’t sustained sliding at the contact, rolling friction is typically much smaller than sliding (static or kinetic) friction, which is why rolling is easier to sustain once motion has started. Static friction stops motion from beginning until a threshold is reached, while kinetic (sliding) friction acts when surfaces slide past each other. Centrifugal force, on the other hand, is a fictitious force that appears in rotating reference frames and is not a frictional interaction. So the type of friction involved with rolling is rolling friction.