Question

A uniform beam of $2m$ is fixed to a wall and loaded by the forces shown above. Given that the beam is at equilibrium, calculate force F.

• A. $2N$
• B. $4N$
• C. $7N$
• D. $8N$

Answer 1

The correct option is A $2N$

Moment of force $M=$ force $\times$ perpendicular distance from pivot

The beam is at equilibrium when moment of force by F is equal to moment of force by 4N.

So, $F\left(2m\right)=4N\left(1m\right)$ or $F=2N$