Which of the following group of forces can produce equilibrium?
Correct answer: D. 12N, 5N, 15N
- A. 12N, 5N, 20N
- B. 4N ,2N, 10N
- C. 10N, 18N
- D. 12N, 5N, 15N
Explanation
For three forces to produce equilibrium, their magnitudes must be able to form a closed triangle, so the largest force must not exceed the sum of the other two. For 12 N, 5 N and 15 N, 15 N < 12 N + 5 N = 17 N, so suitable directions can give zero resultant. The likely trap is 12 N, 5 N and 20 N, but 20 N > 17 N, so equilibrium is impossible.
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