Question

The table given below shows some observations. Classify these observations to show the advantages and disadvantages of friction.
 

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Answer 1

Answer:

advantages= A person is working, lighting of match sticks.

disadvantages=a machine making noise,a freshly printed paper feels warm.

Answer 2

Answer:

Advantages of friction are A person is walking, lighting of match sticks.

Disadvantages of friction are: Machine making noise, a freshly printed paper feels warm.

Explanation:

• A person is walking due to friction only otherwise the person would slip.
• When we rub a matchstick against the rough surface of a matchbox, the friction between the head of the matchstick and the rough side of the matchbox produces heat.
• The machine makes noise due to friction which results in wear and tear of machine parts.
• A freshly printed paper feels warm due to friction which results in a loss of energy.