Physics P3 2003 question

PAPER 3, 2003

1. A student carries out an experiment to find out the relationship between the change in length, y, of a spring and mass, m, of the load on the spring. The arrangement of the apparatus for the experiment is shown in Figure 1. The length of the spring when a load is placed on the piston is l.

At the beginning of the experiment there is no load. The length of the spring is lo. The actual length of lo is shown in Figure 2. The experiment is repeated by using loads with mass, m, equal to 0.5 kg, 1.0 kg, 1.5 kg, 2.0 kg, 2.5 kg. The actual lengths of the spring when the different masses are used are shown in Figure 3, Figure 4, Figure 5, Figure 6 and Figure 7 on the next page.

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Figure 1

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(a) Based on the aim and the procedure of the experiment state the: (i) manipulated variable

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(ii) responding variable

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(iii) constant variable

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(b) Measure lo shown in Figure 2 on page 2

lo = ………………………………….Measure the lengths l of the spring in Figure 3, Figure 4, Figure 5, Figure 6 and Figure 7 when different load are used.

In each case, calculate the change in length, y, of the spring where:

y = (lo- l)

Tabulate your results for m, l and y in the space below.

(c) On the graph paper on page 4, plot a graph of y against m.(5 marks)

(d) Based on your graph, state the relationship between y and m .

…………………………………………………………………………………………………….

(1 mark)'

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Graph of y against m

2. The graph V against I below shows the results of the experiment to determine the electromotive force, E, and the internal resistance, r, of a dry cell.

(a) Based on the graph in Figure 8,(i) What happen when I increases?

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Figure 8

(ii) Determine the value of the potential difference, V when the curent, I = 0.0 A. Show on the graph, how you determine V.

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(iii) Name the physical quantity that represents the value in (a)(ii).

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

(b) The internal resistance, r, of the dry cell is given by

r = - m where m is the gradient of the graph. Calculate the value of r.

(c) (i) From the graph, state the value of V when I = 0.80 A Show on the graph how you determine the value of V.

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[2 marks]

(ii) The resistance E is given bv R =

Calculate R when I = 0.80 A.

[2 marks]

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

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[1 mark]

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1. Each diagram below shows two positions of a student on a swing. The initial position in each diagram is different.

Observe the positions of each of the swing in each diagram and the appearance of the student when she swings.Based on the observations: (a) State one suitable inference that can be rnade.

[1mark]

(b) State one appropriate hypothesis for an investigation.[1mark]

(c) With the use of apparatus such as trolley, thicker timer and other apparatus, describe an experimental framework to test your hypothesis.

In you 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) Way you would tabulate the data (vii) Way you would analysis the data

[10 marks]

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2. The diagram below shows water waves propagated from the sea towards the shore.

Observed the wave pattern and the sea-bed.Based on the observations:(a) State one suitable inference that can be made.

[1 mark]

(b) State one appropriate hypothesis for an investigation.[1 mark]

(c) With the use of apparatus such as ripple tank and other apparatus, describe an experimental framework to test your hypothesis. In you 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) Way you would tabulate the data (vii) Way you would analysis the data

[10 marks]

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