Question

how balls bearings help reduce friction? write any two examples when increasing friction comes to our advantage.

Answer 1

hello frnd!!!

here's ur answer...

ball bearings helps to reduce friction because it has wheels which helps to slide on the ground or in any other place smoothly, thus it helps to reduce friction.

two advantages when increasing friction comes to our advantage:-

1. it helps to walk on the ground.

2. it helps to write.

hope this helps...

Answer 2

Bearings reduce the friction of certain moving parts by replacing sliding friction with rolling friction. 
it helps to 
*Replace sliding friction with rolling element friction
*Replace sliding friction with rolling element friction, such as with the use of rolling element bearings.