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3 marksPhysical Quantities

CAPE Physics Unit 1 · 2007 · Paper 2 · Question 1(b)

The only balance available to the student was a 0 - 500 g instrument whose smallest division is 5 g. Using this balance the student obtained a mass of 30.4 ± 0.3 g for one of the ball bearings. Suggest how the mass of one of the ball bearings could have been determined to the precision indicated above.

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Other parts of this question

  1. 1(a)To find the diameter of the bearings the student lined up 10 identical balls in a row and placed a ruler against them as shown in Figure 1.[1 mark]
  2. 1(a)(i)The positions on the scale were estimated to be: P 1.0 ± 0.2 cm, Q 20.2 ± 0.2 cm. Write down the value for the distance L using the same format.[1 mark]
  3. 1(a)(ii)What value does this imply for the diameter D of one of the spheres?[1 mark]
  4. 1(c)Find the density of the metal used to make the ball bearings, giving your answer to a suitable number of significant figures together with the error…[5 marks]

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