CONFIDENTIAL 4531/3Section A[28 marks]

Answer all questions in this section.

1. A student carries out an experiment to investigate the relationship between the weight of load exerted and air pressure produced in a simple piston system. The apparatus set up for this experiment is shown in Diagram 1.1.

Diagram 1.1

The student starts the experiment with the mass, m of a load of 0.1 kg.The corresponding reading for difference of mercury level, h is shown in Diagram 1.2 on page 3.

The experiment is repeated with different mass of loads which are, m= 0.2 kg, 0.3 kg, 0.4 kg and 0.5 kg. The corresponding readings of difference of mercury level, h are shown in Diagram 1.3, 1.4, 1.5 and 1.6 on pages 3 and 4

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Load

Mercury

h

Trapped air

Piston

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(a) For the experiment described above, identify: (i) The manipulated variable

…………………………………………………………..............…… [1 mark]

(ii) The responding variable

…………………………………………………………............................. [1 mark]

(iii) The constant variable

…………………………………………………………............................. [1 mark]

m = 0.1 kg

F = N

h = cm

P = cm Hg

Diagram 1.2

m = 0.2 kg

F = N

h = cm

P = cm Hg

Diagram 1.3

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CONFIDENTIAL 4531/3

m = 0.3 kg

F = N

h = cm

P = cm Hg

Diagram 1.4

m = 0.4 kg

F = N

h = cm

P = cm Hg

Diagram 1.5

m = 0.5 kg

F = N

h = cm

P = cm Hg

Diagram 1.6

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CONFIDENTIAL 4531/3(b) Calculate the values of Force, F and reading for difference of mercury

level, h for each diagrams. Record the values in the space provided.

[2 marks]

(c) Gas pressure, P is calculated using the formula

P = h + Patm

Where Patm is equivalent to the Atmospheric Pressure, 76.0 cm Hg.For every h and F values in 1(b), calculate Gas Pressure, P and record your values in the space provided.

Tabulate your results for all values of F, h and P in the space given below

[5 marks]

(b) On the graph paper on page 6, plot a graph of F against h. [5 marks]

(d) Based on your graph, state the relationship between F and h.

………………………………………………………………………………………[1 mark]

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CONFIDENTIAL 4531/3Graph of F against h

2 An experiment to investigate the time taken, t by a metal sphere falling from

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CONFIDENTIAL 4531/3a height, h was conducted.

The graph of h against t2 is in Diagram 2.1.

.

Diagram 2.1

(a) Based on the graph in Diagram 2.1,

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0.02 0.04 0.06 0.08 0.10 0.12 t2/ s2

10

20

30

40

50

60

70

80

h / cm

0

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(ii) state the relationship between h and t,

…….…………………………………….................................. [1 mark]

(i) determine the time taken, t by the sphere when dropped from a height,h = 44.0 cm.Show on the graph how you determine the value of t.

t = …………………………………. [3 marks]

(b) Calculate the gradient of the graph, m. Show on the graph how you determine the gradient.

[3 marks]m = ............................................

(c) The motion equation of a falling object with an initial velocity, u is given as

h=u t+ 1

2g t 2

where g is the gravitational acceleration.

(i) State the initial velocity, u of the sphere

…….…………………………………….................................. [1 mark]

(ii) By using the gradient of the graph in (b) and equation in (c), calculate the gravitational acceleration, g .

[3 marks]

(d) State one precaution that should be taken during this experiment.

…………………………………………………………………………………………………………………………………………………………………… [1 mark]

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CONFIDENTIAL 4531/3Section B[12 marks]

Answer any one question

3 Diagram 3.1 and Diagram 3.1 show two difference nails of same mass is knocked into a softwood by using a constant force from a hammer.

Diagram 3.1 Diagram 3.2

Based on the above information and observation:

(a) State one suitable inference. [1 mark]

(b) State one suitable hypothesis. [1 mark]

(c) With the use of apparatus such as slotted mass, plasticine and other suitable apparatus, describe an experimental framework to investigate the hypothesis stated in 3(b).

In your description, state clearly the following:

(i) Aim of the experiment.

(ii) Variables in the experiment.

(iii) List of apparatus and materials

(iv) Arrangement of the apparatus.

(v) The procedure of the experiment which include the method of controlling the manipulated variable and the method of measuring the responding variable.

(vi) The way you would tabulate the data.

(vii) The way you would analyse the data. [10 marks]

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4 Diagram 4.1 shows a balloon during cool day. During hot day the balloon becomes bigger as shown in diagram 4.2.

Cool Balloon Hot Balloon

Diagram 4.1 Diagram 4.2

Based on the above information and observation:

(a) State one suitable inference. [1 mark]

(b) State one suitable hypothesis. [1 mark]

(c) With the use of apparatus such as apparatus such as capillary tube, concentrated sulfuric acid and other apparatus, describe an experimental framework to investigate the hypothesis stated in 4(b).

In your description, state clearly the following:

(i) Aim of the experiment.

(ii) Variables in the experiment.

(iii) List of apparatus and materials

(iv) Arrangement of the apparatus.

(v) The procedure of the experiment which include the method of controlling the manipulated variable and the method of measuring the responding variable.

(vi) The way you would tabulate the data.

(vii) The way you would analyse the data. [10 marks]

END OF QUESTION PAPER

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