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Physics · May / June 2023 · Paper 61 · Question 1

0625

As printed in the paper

The question as text

A student investigates the balancing of a metre ruler. Fig. 1.1 shows the set-up. P x Q 90.0 cm 50.0 cm pivot bench metre ruler y 0 100 Fig. 1.1

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • 1(a)[1]

    10.0

  • 1(b)[1]

    obtaining exact balance

    OR judging position of (centre of) load

    OR masses sliding on ruler

  • 1(c)[4]

    graph:

    axes right way round and correctly labelled with quantity and unit
    suitable scales
    all five plots correct to ½ small square
    good line judgement, thin, continuous line

  • 1(d)[3]

    method shown correctly on graph

    candidate’s value read correctly to ½ small square

    value in range 25.0–29.0 cm

  • 1(e)[2]

    balance ruler (on pivot with no loads)

    pivot point is read / balance point shows centre of mass

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