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Which of the following are the advantages of friction in engineering mechanics?

31. Which of the following are the advantages of friction in engineering mechanics?

1. It allows for smooth motion without resistance
2. It increases the efficiency of machines
3. It reduces wear and tear on moving parts
4. It decreases the force required to move objects

Answer

The correct answer is: C) It reduces wear and tear on moving parts

Explanation

Friction reduces wear and tear on moving parts by providing a gripping force that keeps slippage or sliding.