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1 markPhysical Quantities

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

A student is tasked with determining the density of the metal used to make ball bearings. To find the diameter, 10 identical balls are lined up with a ruler.

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.

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Other parts of this question

  1. 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]
  2. 1(a)(ii)What value does this imply for the diameter D of one of the spheres?[1 mark]
  3. 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 ±…[3 marks]
  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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