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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.

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what is the effect of friction on motion
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Friction generates heat . Sometimes this can be harmful. The heat produced In a fast-moving machine is very high.Proper arrangements have to be made to cool the machine,otherwise it can get damaged . If the cooling arrangement in a car does not work properly, the engine can get jammed .
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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.
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