Equilibrium Of Concurrent Forces - Practice Questions & MCQ

• Concurrent Forces-If all the forces working on a body are acting on the same point then they are said to be concurrent. 

• Three forces will be in equilibrium if they are represented by three sides of a triangle taken in order.

• For equilibrium, 

$\begin{aligned} & \sum \overrightarrow{F_{n e t}}=0 \\ & \text { or } \sum \vec{F}_x=0, \sum \vec{F}_y=0, \sum \vec{F}_z=0\end{aligned}$

• Lami’s theorem: It states that for three concurrent forces in equilibrium,

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