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1 markMachines and Movement

CSEC Integrated Science · May/June 2016 · Paper 2 · Question 4(c)(i)

State what is meant by the term 'inefficiencies of machines'.

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Other parts of this question

  1. 4(a)(i)State ONE advantage and ONE disadvantage of using solar-powered vehicles.[2 marks]
  2. 4(a)(ii)Suggest TWO energy conversions that take place in a moving solar-powered car.[2 marks]
  3. 4(b)(i)Identify the manipulated variable, the responding variable, and two controlled variables in this experiment.[4 marks]
  4. 4(b)(ii)State the formula used to calculate the energy converted (work done) when cars move.[1 mark]
  5. 4(b)(iii)Calculate the energy conversion of the car on the smooth surface and on the rough surface.[2 marks]
  6. 4(c)(ii)Use your calculations in (b)(iii) to deduce which surface made the toy car more efficient, giving a reason.[2 marks]
  7. 4(c)(iii)State ONE factor, other than friction, that contributes to the inefficiency of machines.[1 mark]

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