Engineering Board Exam Reviewer · Engineering Mechanics · medium
A force of 84 N is applied at the end of a 1.5 m lever arm, at an angle of 30° from the lever arm. What is the moment of the force about the pivot at the other end of the arm?
- 63
- 109.12
- 126
- 68.04
Answer
A. 63
Solution
Moment = F × L × ( ) = 84 × 1.5 × (30°) = 63 N· m. Only the component of force perpendicular to the arm produces a moment.
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