Physics 5054/31 — May/June 2018

Cambridge O-Level · Practical Test · worked solutions for every part, with the mark scheme

questions

marks

120

minutes

Topics Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials

Q1Experimental ContextsObservations and MeasurementsAnalysis, Conclusions and EvaluationFree sample

In this experiment, you will investigate the extension of a spring.

You are provided with

a spring,
a length of string,
a stand, boss and rod,
a 30 cm ruler with a mm scale,
a mass holder.

(a)

On the spring provided measure the unstretched length $l_A$ of the coiled part of the spring, as shown in Fig. 1.1.

Fig. 1.1

$l_A$ = ______

(b)

Hold the free end of the spring in one hand and place the string over the rod, as shown in Fig. 1.2.

Fig. 1.2

(i)

Hold the free end of the spring so that the string is horizontal, as shown in Fig. 1.3.

Fig. 1.3

The string is in contact with one quarter of the circumference of the rod.

Slowly pull the spring horizontally to the right until the mass holder starts to move upwards.

Measure the stretched length $l_B$ of the spring at the instant that the mass holder starts to move.

$l_B$ = ______

(ii)

Continue the experiment.

(1) Measure the stretched length, $l_C$ , of the spring at the instant that the mass holder starts to move when the spring is pulled vertically downwards, as shown in Fig. 1.4a. The string is in contact with half of the circumference of the rod.

Fig. 1.4a

(2) Measure the stretched length, $l_D$ , of the spring at the instant that the mass holder starts to move when the spring is pulled horizontally to the left, as shown in Fig. 1.4b. The string is in contact with three quarters of the circumference of the rod.

Fig. 1.4b

$l_C$ = ______

$l_D$ = ______

(c)

Write a conclusion for this investigation and suggest why the lengths $l_B$ , $l_C$ , and $l_D$ are different.

conclusion ______

suggestion ______

The rest of this paper

3 more questions

Q2Use of Techniques, Apparatus and Materials · Experimental Contexts · Analysis, Conclusions and Evaluation · Observations and Measurements5M
Q3Observations and Measurements · Experimental Contexts · Analysis, Conclusions and Evaluation5M
Q4Experimental Contexts · Use of Techniques, Apparatus and Materials · Observations and Measurements · Analysis, Conclusions and Evaluation15M

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