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11. Which of the following sets of concurrent forces may be in equilibrium

(a) F1  3N, F2  = 5N, F3 = 9N

(b) F1  3N, F2  = 5N, F3 = 9N

(c)  F1  3N, F2  = 5N, F3 = 9N

(d) F1  3N, F2  = 5N, F3 = 6N

Ans. d

(18)

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