8bf0eb34_PMM_physics__About_friction__Type
[...and something about it] Wheels rolling over the ground allow less work to overcome friction as if the same mass would be pulled on a sledge. Because of this, engineers frequently prefer roller bearings in order to reduce frictional losses. [Type] 
rolling friction
s l i d i n g f r i c t i o n
r o l l i n g f r i c t i o n
e l a s t i c d e f o r m a t i o n
p l a s t i c / i n e l a s t i c d e f o r m a t i o n
l i q u i d f r i c t i o n
e l e c t r o m a g n e t i c f r i c t i o n
t i d a l f r i c t i o n
s o u n d
PMM physics. About friction
Type