Physics · Oct / Nov 2023 · Paper 61 · Question 1
0625
As printed in the paper
The question as text
A student determines the weight of a metre ruler using a balancing method. Fig. 1.1 shows the set-up. P metre ruler 90.0 cm pivot bench a b Fig. 1.1
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
1(a)[1]
a = 15(.0)
1(b)[4]
Graph:
Axes correctly labelled and right way round
Suitable scales
All plots correct to ½ small square
Good line judgement, thin, continuous line
1(c)[2]
Method shown clearly on graph
Triangle using at least ½ of candidate’s line between extreme plots.
1(d)[2]
W = 2G with unit N
W in range 1.0–1.4
1(e)[1]
Difficult to obtain exact balance
OR difficult to judge position of (centre of) load
OR load / ruler may slide
1(f)[1]
Balance rule on pivot, balance point is at centre of mass / Find where the rule balances.
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