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5054/32

Physics 5054/32 — October/November 2020

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

4
questions
30
marks
120
minutes

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

Q15MObservations and MeasurementsExperimental ContextsAnalysis, Conclusions and EvaluationUse of Techniques, Apparatus and MaterialsFree sample

In this experiment, you will investigate the effect on forces of using pulleys.

You are provided with:

  • three identical springs
  • two 100 g mass hangers and three 100 g masses
  • a system of pulleys
  • a 30 cm ruler
  • a stand, three bosses and two clamps
  • a heavy weight
  • thread.

The supervisor has set up the apparatus as shown in Fig. 1.1.

(a)
(i)

Spring A is placed on the card labelled ‘Spring A’.

Measure the unstretched length AuA_u of spring A as shown in Fig. 1.2.

AuA_u = ______ mm\text{mm}

1M
(ii)

Measure:

  • the length BsB_s of the stretched spring B

BsB_s = ______ mm\text{mm}

  • the length CsC_s of the stretched spring C

CsC_s = ______ mm\text{mm}

1M
(iii)

Calculate:

  • the extension BxB_x of spring B where
Bx=Bs−AuB_x = B_s - A_u

BxB_x = ______ mm\text{mm}

  • the extension CxC_x of spring C where
Cx=Cs−AuC_x = C_s - A_u

CxC_x = ______ mm\text{mm}

1M
(b)

State how the force exerted on spring B compares with the weight of the 300 g mass.

Explain your reasoning by referring to the extensions of the springs.

1M
(c)

Suggest one change to the arrangement of the apparatus in Fig. 1.1 that would eliminate the need to use a heavy weight on the stand.

Explain your answer.

change ______

explanation ______

1M

The rest of this paper

3 more questions
  • Q2Experimental Contexts · Planning Experiments and Investigations5M
  • Q3Experimental Contexts · Observations and Measurements · Analysis, Conclusions and Evaluation5M
  • Q4Observations and Measurements · Experimental Contexts · Analysis, Conclusions and Evaluation · Use of Techniques, Apparatus and Materials15M
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