How does friction affect the motion of objects ... - JSS2 Basic technology Types of Motion Question

Friction opposes the motion of objects, creating resistance that can both aid and hinder movement. It allows us to walk without slipping and enables vehicles to grip the road. However, friction also causes wear and tear on mechanical parts and generates heat, reducing the efficiency of machines. To manage and reduce friction, lubrication such as oil or grease can be applied between surfaces to create a slippery layer. Smoothing surfaces through polishing can decrease roughness, while using wheels or rollers can convert sliding friction to rolling friction, which is lower and more manageable.