Explain various techniques for reducing frictio... - JSS2 Basic technology Forces and Friction Question

Reducing friction is essential to improve efficiency and longevity of mechanical systems. Lubrication, such as applying oil or grease, creates a slippery layer between surfaces, reducing friction and wear. Smoothing surfaces by polishing minimises roughness, decreasing resistance. Using wheels or rollers converts sliding friction to rolling friction, which is lower and more manageable. Ball bearings are employed in machinery to facilitate smooth motion by reducing contact between moving parts. Streamlining shapes, like in vehicle design, reduces air and water resistance, enhancing performance and fuel efficiency.