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

AcademicChemistryNCERTClass 8

Activity
  • Take threads of cotton and nylon (synthetic fibres) of about same length and thickness.
  • Hang cotton thread from a stand.
  • Attach a pan at the other end of the thread.
  • Add weights, one by one, to the pan until the thread breaks (see fig.) note the total weight required to break the cotton thread.
  • This gives a measure of the tensile strength of the thread.
  • Repeat the same with nylon thread.

"ncert-exemplar-problems-class-8-science-synthetic-fibres-and-plastics-3"

Conclusion

Much more weight is required to break the nylon thread showing that nylon thread has greater strength than cotton thread.

raja
Updated on 10-Oct-2022 13:23:58

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