2023 · Specimen · 5054/04 | Q3

0/23parts marked · 0 of 40 marks

Question (3 of 4)14 marks · Practise this topic →

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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)

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.

Fig. 3.1: front and side views of a mass, with diameter d and width w marked. — 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)

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.

Fig. 3.2: two masses covering part of the scale at the end of a metre rule.

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)

The other end of the metre rule is attached to the bench as shown in Fig. 3.3.

Fig. 3.3: metre rule clamped to a bench, with masses at its free end.

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

Answer guidance

Complete Fill in every gap. A partly completed answer usually scores partly.

[1 mark]

(c)(iii)

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.

Original blank graph-paper grid for plotting t against L.

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