Engineering Board Exam Reviewer · Engineering Mechanics · easy
Two concurrent forces, F1 = 110 N and F2 = 97 N, act on a particle with an angle of 50° between them. What is the magnitude of their resultant force?
- 207
- 13
- 187.69
- 194.57
Answer
C. 187.69
Solution
Using the law of cosines for two concurrent forces: R = sqrt(F1² + F22 + 2 · F1 · F2 · ( )) = sqrt(110² + 972 + 2(110)(97) (50°)) = 187.69 N.
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