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Question 8
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A body of mass 4 kg hangs from a fixed point O by a light inextensible string. It is pulled aside by a horizontal force FN and rests in equilibrium with the string inclined at angle 60o to the downward vertical. Calculate, correct to two decimal places, the
- magnitude of F.
- tension in the string.
[Take g = 10 ms-2]
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The report commended candidates’ performance in this question as it was said to be an improvement when compared with previous years. However, candidates should sketch the diagram as shown below:
Using Lami’s theorem,  . Simplifying gave F = 69.28N.
From  =  , we obtain T =  |
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