Question

Name four ways by which friction can be reduced between two surfaces in contact

Answer 1

1. by lubrication
2. by using ball bearing
3. by using powder
4. by using oil and grease

Answer 2

hello!

ways to reduce friction.,

1. lubricating - adding lubricants like oil or grease fills the irregularities and friction is reduced
2. ball - bearings - using ball bearings, heavy round metals between moving objects converts kinetic friction to rolling friction. (since, rolling friction is less than kinetic friction
3. polishing - polishing surfaces removes irregularities and thus friction decreases.
4. stream lining - aeroplanes and rockets are streamlined to avoid friction due to air.