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QUESTION 8

Figure 11 shows an experiment to investigate the factors affecting the swing of simple

pendulum.

FIGURE 11

Experiment is carried out according the following procedures

P1 : The metal bob is displaced through a small angle and let it go. At the same time, the

stopwatch is started

P2 : The stopwatch is stopped after 20 complete swings.

P2: The time for 20 complete swing is recorded

P3: Procedures P1,P2 and P3 are repeated to obtain a second and third reading. The time

for 1 complete swing is calculated

P4: The experiment is repeated using simple pendulum of different length as shown in table

4

Table shows the result of an experiment

Length of

pendulum

(cm)

Time for 20 complete swings (s)

Time for 1

complete swing (s)

1

2

3

Average

20 17 16 16 16.3 0.8

40 24 24 23 23.6 1.2

60 31 33 32 32

Table 4

a) Complete the table 4.

(1 mark)

b) State the variables involved in the experiment.

i- constant variable : ………………………………………………………

ii- respond variable : ………………………………………………………

iii- manipulated variable :………………………………………………….

( 3 marks)

Y X

Wood pieces

Length of

pendulum

Metal bob

(a) (b)

8 (a)

1

8 (b)

1

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c) Why do we need to take 20 complete swings of the pendulum?

…………………………………………………………………………………...

( 1 mark )

d) From table above, what will happen to the time for 1 complete swing if the

length of pendulum increase.

……………………………………………………………………………...

( 1 mark )

e) What is the relationship between manipulated variable and respond variable.

………………………………………………………………………………….

( 1 mark )

f) Draw the graph to show time for one complete swing and the length of

pendulum.

Time for 1

Complete

Swing (s)

Length (cm) (1 mark)

g) Predict the time for one complete swings if the length of pendulum is

i. 30 cm : ………………………………………………………………….

( 1 mark )

ii. 80 cm ………………………………………………………………….

( 1 mark )

h) What conclusion can be made from this experiment?

…………………………………………………………………………………

(1 mark)

i) Base on figure 11(b), what is the meaning of the complete swings?

…………………………………………………………………………………..

(1 mark)

8 (c)

1

8(d)

1

8 (e)

1

8(h)

1

Total

12

22

6(i)

1

8 (f)

1

8 (g)

2

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Schema

a) 1.6 s

b) A complete swing starts from X to Y and back to X again.

c) i - weight of metal bob

ii –time taken for 20 swings

iii – length of pendulum

d) To get more accurate time for 1 complete swing

e) Pendulum takes a longer time to swing

f) If the length of pendulum increase, the time for 1 complete swing increase too.

g)

Time for 1

Complete

Swing (s)

Length (cm)

h) i. 1.0 s

ii. 2.0 s

g) The simple pemdulum wii swing slower if the length of pendulum is

longer.

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a) State the function of the above system

……………………………………………………………………………………………

( 1 mark)

b) According to the above figure arrange the digestive system with letter in a correct

sequences.

……………………………………………………………………………………………

( 1 mark)

c) State a part of the digestive system which the process as in the figure below occurs

……………………………………………………………………………………………

( 1 mark)

d) What will happen if Q does not function well?

………………………………………………………………………………………….

(1 mark)

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e) i) Complete the statement below :

Type of enzyme Food class End product of digestion

Amilas carbohydrate ……………………..

Protease protein ……………………..

Lipase fats …………………….

(3 marks)

ii) What will happen to the end product of digestion?

…………………………………………………………………………………...

( 1 mark)

Total

8

5(e)

4