Question

Write two advantages and two disadvantage of friction.​

Answer 1

Explanation:

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.

Answer 2

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➩ Friction produces unnecessary heat leading to the wastage of energy.

➩ The force of friction acts in the opposite direction of motion, so friction slows down the motion of moving objects. Forest fires are caused due to the friction between tree branches.

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