Q. 124.7( 3 Votes )

Give examples of how is friction responsible for energy wastages? Give suggestions to reduce energy wastages by friction.

Answer :

Friction resists the relative motion between two bodies. So greater the resistive force, lesser is the amount of work done. This leads to wastage of applied with the intent of having some work done b the object.


Examples:


1. Overheating of the engine of vehicles. The friction in the engine is responsible for producing heat ( Total energy remains constant according to Law of Conservation of Energy. So the amount of energy which is not being used to do work is getting converted into heat energy.)


2. Friction also causes wear and tear of moving parts of a device. Materials get torn away at the surfaces because of the movement between rough and uneven surfaces.


Suggestions to reduce energy wastages:


1. Friction can be reduced by using lubricating oil between two rough surfaces to make them smooth.


2. We know that rolling friction is lesser than kinetic friction. So wheels can be attached to a moving object to convert the kinetic friction into rolling friction.


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