Friction — PHYSICS STD 6 — Question

Friction is a force that opposes relative motion between two bodies/surfaces in contact with each other. Although friction opposes motion, it also makes motion possible. Friction helps us do many things like :

• It helps us in walking. In the absence of friction, we may slip or fall.
• Cars and buses are able to move safely on roads due to the friction between the treaded tyres of these vehicles and the surface of the road.
• Friction allows us to hold objects with our hands.
• It allows us to write on a paper.
• Friction produces heat. In winter, when we rub our cold hands, the heat produced due to friction makes our hands warm.