Physics Worksheet - Half-Yearly Examination - Kullegg Maria Regina Boys' Secondary School - 2013-2014 Page 9
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9(ii) Describe briefly how he should carry out this experiment.
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(iii) What should he conclude from this experiment?
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c) Figure 3 shows a metal sphere being balanced by the weight of a uniform wooden bar
and a coin.
metal
coin
15 cm
5 cm
10 cm
sphere
wooden bar
0.2 N
pivot
1 N
Figure 3
W
(i) Label with a letter ‘X’ the centre of gravity of the wooden bar.
[1]
(ii) Calculate the clockwise moment in Ncm.
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(iii) What is the value of the anti-clockwise moment?
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(iv) Calculate the weight of the metal sphere.
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(v) Calculate the upward force exerted by the pivot on the metre rule.
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(vi) What would be observed if the metal sphere is moved closer to the pivot?
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END OF PAPER
Page 9 of 9
Physics Half yearly exam 2014 – Track 3 - Form 3
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