Question

which kind of friction is the least in solids and why?​

Answer 1

Static friction is strongest, followed by sliding friction, and then rolling friction, which is weakest in solids.

Rolling friction is the resistance to motion experienced by a body when it rolls upon another. It is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them. And if both are perfectly rigid, there is no surface of contact.

Answer 2

• Rolling friction is least in solids.
• Rolling resistance is usually less than static friction because the surface of contact is very very small in real life so the net normal force is also small and not enough like the static friction to prevent the body from sliding and keep it unmoved and static friction also increases with the increase of the external