1.

Which of the following sets of concurrent force may be in equilibrium?A. `F_1= 3N, F_2= 5N, F_3= 1N`B. `F_1 = 3N, F_2 = 5N, F_3= 9N`C. `F_1 = 3N, F_2= 5N, F_3= 6N`D. `F_1= 3N, F_2= 5N, F_3= 15N`

Answer» Correct Answer - 3
`F_1 - F_2 le |vecF_1 + vec F_2| le F_1 + F_2 `
To produce zero resultant `F_3` must lie between
`F_1 - F_2 le F_3 le F_1 + F_2`


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