give an example to show the effect of heat generated in a machine due to excessive friction
An example of heat generation in a machine due to friction is electric chainsaw. Might have seen while cutting wood or taking off the trees the generally heat up. Another good example cutting big blades attatched on machines on contruction sites usuall used for cuttung metal rods, etc are enabled with water spraying system which automatically start spraying water when switched on to avoid over-heating while cutting.