Question

Write an activity to show that synthetic fibres are stronger than the cotton fibres.

Answer 1

The following activity can be performed to show that synthetic fibres are stronger than the cotton fibres:
- Take an iron stand with a clamp. Take a cotton thread and a nylon thread (synthetic) of the same length, say 60 cm. Both the threads should almost be of the same thickness.
- Tie the thread to the clamp so that it hangs freely from it. At the free end, suspend a pan so that weights can be placed on it.
- Add weights one by one till the thread breaks.
- Note down the total weight required to break the two threads.
- Perform this activity for both cotton and nylon threads and note down your observations as below:

Observations:

Serial No.	Type of thread/ fibre	Total weight required to break the thread (in grams)
1.	Cotton	x
2.	Nylon	y

- It will be observed that the reading y is more than x, which means that more weight is required to break a nylon thread.
Conclusion:
- From this activity it can be concluded that nylon, a synthetic fibre is stronger than cotton, a natural fibre.