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5 marksHarmonic Motion

CAPE Physics Unit 1 · 2005 · Paper 2 · Question 2(a)

Two steel pendulum bobs are suspended, with a heavy pendulum driving a lighter one when it oscillates. The heavy pendulum's length is fixed at 40.0 cm, while the lighter pendulum's length (L) can be varied. The large pendulum bob had a constant amplitude of 5.0 cm. Data in Table 2 shows the amplitude of oscillation of the small pendulum for various lengths.

On the grid provided on page 6, plot a graph to show how the amplitude of the driven pendulum varies with its length.

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Other parts of this question

  1. 2(b)The last TWO readings in Table 2 seem to be extra readings. Why did the experimenter consider it necessary to go back and take these extra readings?[1 mark]
  2. 2(c)Calculate the period and frequency of the heavy pendulum.[3 marks]
  3. 2(d)What is the resonant frequency of the light pendulum?[1 mark]

More practice: the rest of this paper · more Harmonic Motion questions · all CAPE Physics Unit 1 past papers