Provide some examples:
How friction causes wastage of time and energy
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friction has both good and bad aspect
friction between various parts of the machines lead to a loss of energy and thereby reduces the efficiency of machine .
.It also cause wear and tear of moving part of the machines
friction between various parts of the machines lead to a loss of energy and thereby reduces the efficiency of machine .
.It also cause wear and tear of moving part of the machines
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Explanation:
walking causes wastage of energy
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