Three coplanar forces of magnitudes , , and acting at a point are in equilibrium. The angles opposite to these forces are , , and respectively. According to Lami's Theorem:
Answer and explanation
Correct answer: B.
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- Step 1: State the physical principle of Lami's Theorem for three coplanar, concurrent forces in static equilibrium.
- Step 2: By forming a closed triangle of forces and applying the Sine Rule to the vector triangle, the magnitude of each force is directly proportional to the sine of the angle between the lines of action of the other two forces :
Answer
.
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