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(See overleaf
11
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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12
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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13
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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15
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