Question

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3) Write three situations where you think friction is an advantage
and three situations where you think friction is a disadvantage

Answer 1

Answer:

Advantages of friction:

1. Friction enables us to walk freely.

2. It helps to support ladder against wall.

3. It becomes possible to transfer one form of energy to another.

4. Objects can be piled up without slipping.

5. Breaks of vehicles work due to friction.

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

ADVANTAGE :

1) we can catch a beaker because of friction

2) we can walk on road because of friction

3) vehicles can run on roads because of friction

DISADVANTAGE :

1 sole of shoe get weared out because of friction

2 sharpness of knife get lost because of friction

3 tyres of vehicles wear out because of friction