# Static Equilibrium

## Key Questions

• Fairly simple! Don't overcomplicate it.

$\Sigma F = 0$

$\Sigma \tau = 0$

Why? The object isn't moving! So no net forces or torque must be acting on it.

• In a static equilibrium, all the forces balance each other and object is either not moving or moving with uniform velocity and hence net force is zero .

Static equilibrium means that all the forces acting on a body are equal $\mathmr{and}$ operating in a direction exactly opposite to another.