CP 8 tensile strength of plant fibres unit 3

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Last updated 2:28 PM on 10/6/26
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5 Terms

1
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what is tensile strength

the maximum stretching force that can be applied to a tissue before it beaks

2
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what fibres are found in plants

vascular tissues (xylem and phloem) sclerenchyma fibres (lignified support tissues)

3
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outline the procedure to test the tensile strength of plant fibres

  • use forceps to separate the fibres

  • cut fibres into equal lengths with equal diameters

  • hold the fibre rigid using 2 clamps

  • add weights to the fibre 10g at a time until the fibre breaks record the mass added before the fibre broke

  • repeat steps 3-4 and take a mean of the mass


4
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what are the controlled variables of this practical

number of fibrous strings tested per plant

diameter/length of fibrous strings

5
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what is the tensile strength of fibres determined by

the chemical composition of the plant eg. cellulose and lignin content