# State Lami’S Theorem.State the Necessary Condition for Application of Lami’S Theorem. - Engineering Mechanics

State Lami’s theorem.
State the necessary condition for application of Lami’s theorem.

#### Solution

Lami's theorem states that if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two forces.

According to Lami’s theorem, the particle shall be in equilibrium if :
A/sin alpha =B/sinβ =C/sin Y
The conditions of Lami’s theorem are :
(1)Exact 3 forces must be acting on the body.
(2)All the forces should be either converging or diverging from the body.

Concept: Condition of equilibrium for parallel forces
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