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1 markMachines and Movement

CSEC Integrated Science · 2006 · Paper 2 · Question 2(b)(iii)

Figure 1 illustrates three activities involving energy conversion: A (children on a see-saw), B (a striking match), and C (a person playing a guitar).

State the class of lever represented in Diagram A of Figure 1.

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Other parts of this question

  1. 2(a)(i)Define the term 'energy'.[1 mark]
  2. 2(a)(ii)Name TWO forms of energy.[2 marks]
  3. 2(b)(i)Examine Figure 1 and state the energy conversion taking place in EACH of the diagrams, A, B and C.[3 marks]
  4. 2(b)(ii)In Diagram A of Figure 1, the girl weighs 40 kg and is seated 3 m away from the centre of the see-saw. If the boy weighs 30 kg, calculate at what distance from…[3 marks]
  5. 2(c)If the force applied (load) is 8 N and the effort is 2 N, calculate the mechanical advantage of the bottle opener.[2 marks]
  6. 2(d)(i)State ONE factor which may contribute to the inefficiency of the car jack shown in Figure 3.[2 marks]
  7. 2(d)(ii)Suggest ONE method that may be used to overcome the inefficiency of the car jack in (d)(i).[1 mark]

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