Track 2 Form 3 Physics Worksheet - Annual Examinations For Secondary Schools, 2014 Page 6

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Draw on the same axes the graph that would result.
[1]
SECTION B
Each question carries 15 marks. This section carries 45 marks of the total marks for this
paper.
6. This question is about moments.
a) Fill in the missing words:
The moment of a force depends on the size of the _____________ and its perpendicular
_______________ from the pivot.
[2]
force
sensor
block
data logger
stand
pivot
Figure 8
b) Amy sets up a metre rule of negligible weight such that it is pivoted at one end and is kept horizontally b
given in the table below.
Distance of mass from pivot (cm)
10
20
30
40
50
60
70
Force measured by force sensor (N)
2.5
5.0
7.5
10.0
12.5
15.0
17.5
i) Plot a graph of Force (N) on the y-axis against Distance (cm) on the x-axis.
[5]
ii) Amy repeats the experiment using a block of larger mass. She places it on the 40 cm mark.
Underline the correct answer.
The increase in mass will bring about:
(an increase, a decrease, no change) in the weight of the block,
(an increase, a decrease, no change) in the force measured by the force sensor,
(an increase, a decrease, no change) in the clockwise moment.
[3]
c) Alex is practising windsurfing as in Figure 9. The windsurf and
Wind force
Alex are balanced.
180 N
i) Continue the principle of moments: In equilibrium total
anti-clockwise moments __________________________
1.6 m
____________________________________________
[1]
pivot
Physics – Secondary Schools – Track 2 – Form 3 – 2014
Page 6 of 12

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