Quelpr
4 marksMachines and Movement

CSEC Integrated Science · May/June 2012 · Paper 2 · Question 4(b)(i)

Figure 5 shows an arm upon completing the lifting of an object.

Explain why the action of the biceps, elbow joint and forearm during the lifting of the object can be referred to as a distance multiplier.

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Other parts of this question

  1. 4(a)(i)What is the function of a simple machine?[1 mark]
  2. 4(a)(ii)Name ONE simple machine other than the lever and pulley.[1 mark]
  3. 4(a)(iii)State the formula for the 'mechanical advantage of a simple machine'.[1 mark]
  4. 4(a)(iv)A mechanic uses a pulley to apply an effort of 100 N to lift a car engine of weight 1000 N. Calculate the mechanical advantage of the pulley.[2 marks]
  5. 4(a)(v)The pulley made a squeaking sound when it was being used, so the mechanic lubricated the pulley. Explain why he now uses less effort to lift the load.[2 marks]
  6. 4(b)(ii)Name the class of lever presented in Figure 5.[1 mark]
  7. 4(c)Label on the diagram the effort, load and fulcrum.[3 marks]

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