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Eleven forces each equal to 5N act on a particle simultaneously. If each force makes an angle $30^{0}$ with the next one, the resultant of all forces is

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zero

55 N

15 N

5 N

answer is A.

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Detailed Solution

According to polygon law of vector addition, the condition is $θ = \frac{2 π}{n} \Rightarrow n = \frac{360^{0}}{30^{0}} = 12$

But given is eleven hence resultant is 5 N.

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