Quelpr
2 marksMachines and Movement

CSEC Integrated Science · 2005 · Paper 2 · Question 2(a)(v)b)

A tennis racket manufacturer tests three string samples (P, Q, and R) to evaluate their strength and elasticity under various hanging loads. Figure 3 shows the load-extension graphs.

State which string was chosen for school children's rackets and provide one reason for the selection.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 2(a)(i)State which feature of the strings must be kept constant or controlled during these tests.[1 mark]
  2. 2(a)(ii)State what the investigator should do after removing each load before adding another during the tests.[1 mark]
  3. 2(a)(iii)Provide two reasons explaining the shape of the graph lines shown in Figure 3.[2 marks]
  4. 2(a)(iv)Explain which string (P, Q, or R) can support the largest load while still remaining elastic.[3 marks]
  5. 2(a)(v)a)State which string was chosen for professional tournament rackets and provide one reason for the selection.[2 marks]
  6. 2(b)(i)State two properties of aluminium that make it suitable for batsman protective headgear coated with fabric.[2 marks]
  7. 2(b)(ii)Suggest one environmental condition or factor that encourages mildew growth.[1 mark]
  8. 2(b)(iii)Explain how the batsman could have stored or treated his protective gear to prevent mildew growth.[1 mark]

More practice: the rest of this paper · more Machines and Movement questions · all CSEC Integrated Science past papers