Question

Which type of friction comes into play when a book is kept on cylindrical pencil is moved by pushing

Answer 1

Rolling friction comes into play when a book is kept on the cylindrical pencil is moved by pushing.

Rolling resi stance, also called rolling friction or, is the force resisting the motion when a body rolls on a surface.

This is mainly caused by non-elastic effects; that is, not all the energy needed for deformation (or movement) of the wheel, roadbed, etc.

Answer 2

"When a book is kept on a cylindrical pencil is moved by pushing, the friction present in that process is rolling friction.  

Rolling friction which is also called as "Rolling Resistance" can be defined as the force which is resisting the motion of an object when the object rolls on any surface.

Such forces mainly occur due to non-elastic effects.

These forces do not need any energy for movement. The "rolling friction" is much more common in a wheel, roadbed, etc."