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6 marksHarmonic Motion

CAPE Physics Unit 1 · 2001 · Paper 2 · Question 7(b)

Describe TWO practical cases in which the resonance that occurs is desirable and TWO cases in which it is not. Explain how damping may be achieved in the undesirable cases.

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Other parts of this question

  1. 7(a)Explain what is meant by mechanical resonance.[2 marks]
  2. 7(c)(i)Determine, T, for a leg which is 0.9 m long, if the centre of mass is mid-way along the leg.[12 marks]
  3. 7(c)(ii)Determine the speed of walking (in km h⁻¹) which is most effortless, if the person takes steps that are 0.8 m long.[1 mark]
  4. 7(c)(iii)Calculate the maximum acceleration of the leg during the walk.[1 mark]

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