Question

what is friction and how to reduce friction

Answer 1

hey!
here is your answer
friction is the action of one surface rubbing against the other. it can be reduced by adding oil on the ground as oil reduces friction
hope it helps you
have a good day ahead

Answer 2

When ever two bodies in contact tend to move with respect of each other, an opposing force immediately comes into play which oppose the relative motion between two bodies in contact friction or the frictional force

reduced friction by:
1) friction can be minimised by making the surface smooth and by polishing them.
2) use of grease or oil as lubricant between the surface in contact in machinery considerably reduce friction.