Physics · Oct / Nov 2025 · 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 apparatus. load object Q 50.0 cm mark 90.0 cm mark metre ruler bench pivot x 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)[2]
40(.0)
given to nearest 0.1 cm
1(b)(i)[2]
W = 1.075 / 1.08 / 1.1
W given to 2 or 3 significant figures
1(b)(ii)[1]
New W given to same number of significant figures as in (i)
1(c)[2]
Statement to match results
Explanation with (W values quoted and) matching statement and results
1(d)[1]
A diagram clearly showing a suitable approach e.g. edges of object Q symmetrically either side of 90.0 cm mark. Or wording describing the method.
1(e)[1]
Repeat and average OR Move the load back and forth / slowly (to establish the range within which the balance point resides or until best balance).
1(f)[2]
3 mm OR 0.3 cm
Correct working shown
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