Question

Disadvantages of friction​

Answer 1

Answer:

Disadvantages of friction:

1.It always resists the motion, so extra energy is required to overcome it.

2.It causes wear and tear of machines.

3.It decreases the life expectancy of moving parts of vehicles.

4.Since friction is very useful in some cases while harmful in some cases, friction is called a necessary evil.

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Answer 2

Answer:

Wear and tear

Explanation:

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