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Q.

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

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a

5 N

b

Zero

c

55 N

d

15N

answer is C.

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Detailed Solution

Question Image

$n - 1 = 11$

$n = 12$

R angle $= \frac{2 π}{n} = \frac{2 \times 180}{12} = 30 °$

R angle $= 30 °$

Magnitude of vector, R = 5 N

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