Alternative to Practical: use the supplied data. Print measurement diagrams at the width stated in the question; screen previews resize them. Upload graphs and the readings used.
(a)Read question and case materials as text
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A student investigates oscillations of two 100 g masses attached to a metre rule.
Measure d and w on Fig. 3.1 and record both lengths with units. Original width of Fig. 3.1: 115.1 mm. Print at this width for accurate measurement. Do not measure an automatically resized screen preview.
A student investigates the oscillation of masses attached to a metre rule.
She attaches two 100 g masses to the end of the metre rule. The diameter and width of one of the masses are shown in Fig. 3.1.
For ruler measurements, print at 100% scale. Screen size and zoom change physical lengths.
On Fig. 3.1, measure the lengths d and w.
d = ........................ unit = ..........
w = ........................ unit = ..........
[1 mark]
(b)(i)Read question and case materials as text
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A student investigates oscillations of two 100 g masses attached to a metre rule.
The masses are stuck together with putty on the end of the rule, covering part of its scale, as shown in Fig. 3.2.
Describe how to determine the position of the centre of the masses on the rule.
The student sticks the pair of masses together and secures them to the end of the metre rule using adhesive putty.
Part of the scale at the end of the rule is covered by the masses, as shown in Fig. 3.2.
Describe a method to determine the position of the centre of the masses on the metre rule.
Answer guidance
Describe Say what happens, in order. Reasons are not required unless the question also asks why.
[1 mark]
(b)(ii)
Suggest why the student does not attach the masses to the lower side of the metre rule.
Answer guidance
Suggest More than one answer may be acceptable, so long as it is consistent with the physics.
[1 mark]
(b)(iii)Read question and case materials as text
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A student investigates oscillations of two 100 g masses attached to a metre rule.
The masses are stuck together with putty on the end of the rule, covering part of its scale, as shown in Fig. 3.2.
Fig. 3.3 shows the other end clamped to a bench. Its edge is at the 10.0 cm mark. Determine distance L along the rule from this edge to the point directly below the centre of the masses. Use your value of d from (a). Show working; give L in cm.
The other end of the metre rule is attached to the bench as shown in Fig. 3.3.
The edge of the bench is at the 10.0 cm mark on the metre rule.
Determine the distance L, along the rule, from the edge of the bench to the point on the rule directly below the centre of the masses. Use your value of d from part (a).
Show your working.
L = ...................................... cm
Answer guidance
Show The result is given, so every step of the reasoning is what earns the marks.
[2 marks]
(c)(i)
The student lifts the free end of the metre rule until the rule is approximately horizontal.
Then she releases the rule and observes the masses oscillating.
She measures the time taken for 20 oscillations. She repeats the procedure once more and records the times shown:
10.56 s 10.51 s
Determine the time t for one oscillation.
Show your working.
t = ...................................... s
Answer guidance
Show The result is given, so every step of the reasoning is what earns the marks.
[2 marks]
(c)(ii)
The student repeats her experiment for four more values of L by moving the masses along the top surface of the metre rule.
In Table 3.1, record your value of L from (b)(iii) and your value of t from (c)(i).
Add an appropriate unit to the heading of each column.
Table 3.1
L / ..........
t / ..........
..........
..........
80
0.46
70
0.42
50
0.27
40
0.22
Swipe sideways to see all columns.
Answer guidance
Complete Fill in every gap. A partly completed answer usually scores partly.
[1 mark]
(c)(iii)Read question and case materials as text
Text can be resized with your browser. Refer to the original figures below for diagrams and their layout.
A student investigates oscillations of two 100 g masses attached to a metre rule.
The masses are stuck together with putty on the end of the rule, covering part of its scale, as shown in Fig. 3.2.
The free end is lifted until approximately horizontal and released. The times for 20 oscillations are 10.56 s and 10.51 s.
Table 3.1 has columns L and t. Row 1 is your L from (b)(iii) and your t from (c)(i). The other rows are (80, 0.46), (70, 0.42), (50, 0.27), (40, 0.22).
Plot t on the y-axis against L on the x-axis using Table 3.1. You do not need to start from (0, 0). Draw the straight line of best fit. Use graph paper.
On the grid, plot a graph of t on the y-axis against L on the x-axis.
You do not need to start your graph from the origin (0, 0).
Draw the straight line of best fit.
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[4 marks]
(c)(iv)
Use the graph to estimate the value of t when L = 60 cm.
t = ...................................... s
Answer guidance
Using You must use the thing it names. An answer that reaches the right value another way may not score.
[1 mark]
(d)
Explain why it is not practical for the student to reduce the value of L to less than 40 cm.
Answer guidance
Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.
[1 mark]
5054/04/SP/23Cambridge O Level Physics 5054 · Specimen 2023 · Paper 4 · Question 3