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TNTRB 2017 ME Official Question Paper

Option 3 : Coplanar and concurrent forces

**Explanation:**

Lami's theorem:

If three **coplanar and concurrent forces** acting on a particle, keep it in **equilibrium**, then **each force** is proportional to the **sine of the angle between the other two** and the constant of proportionality is the same.

Consider three forces F1, F2, F3 acting on a particle or rigid body making angles α, β, and γ with each other.

Mathematically,

\(\frac{{{F_1}}}{{\sin \alpha }} = \frac{{{F_2}}}{{\sin \beta }} = \frac{{{F_3}}}{{\sin \gamma }}\)

ST 1: Logical reasoning

5361

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